hash – What hardware do pool operators use for calculating the hashmerkleroot?

I’ve reviewed the response here: How do pool operators do their hashing? and acknowledge that the ratio of hashing required by pool operators is incomparable to the miners.

I still wonder what hardware do Mining pools employ to perform the calculation of the hashmerkleroot for every miner? Would there be any performance improvement in utilising specialised hardware vs a generic yet powerful CPU? (especially when there are an average of 2000 transactions per block each being around 600 bytes in size)

What is your favorite place to buy server’s hardware?

What is your favorite place to buy server’s hardware? | Web Hosting Talk


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var content_container_margin = parseInt(‘350px’);
var sidebar_width = parseInt(‘330px’);
//–>









  1. What is your favorite place to buy server’s hardware?


    Hey all,

    how you been doing in this strange time?

    I wander what are your experiences when buying servers and components?

    I am interested in new servers and components. Not in refurbished stuff.

    What are your favorite merchants and why?













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Key Door Hardware Components for Safety and Security

Understanding door hardware options and opportunities is the first step in turning threats and weaknesses into strengths. Entry doors with window mesh might be in bad condition, with broken closers, loose hinges, doors that sag or are sticking, latches that do not align properly with the strike, and wide gaps between the door and frame that pry open easily. Other access points might use old technology.

    Poorly maintained hardware offers the easiest path for unauthorized entry. Old technology is next and soon might become a weakness. Vendors know the best options for meeting ASTM/BHMA standards for the manufacture and testing commercial grade hardware. ANSI Grade 1 hardware is specifically designed for high-traffic areas because it can withstand the highest number of life cycles and is much harder for an active shooter to break through.

    Upgrades that deliver greater safety and security include replacing Grade 2 and 3 components with Grade 1 hardware. A further upgrade involves integrating the latest generation of commercial electronic UPVC door locksets, closers, hinge hardware and alarms with a central control system.

    Managers need to pay special attention to levels of access to facilities. Authorized personnel need access and, in emergency situations, rapid and safe egress, while unauthorized personnel have to be kept out. Firefighters and other emergency personnel need ease of entry to locate and evacuate people rapidly.

    Increasingly, managers are installing card and PIN UPVC door lock systems, and they are rearranging traffic flows to channel visitor traffic at elevator lobbies toward properly staffed, secure reception areas. Only authorized personnel should be able to enter the main building through locked lobby doors.

    Among the most common door hardware components upgraded for improved security are the following:

    Closers. 

    Standard and custom door closers include surface-mounted and hidden, heavy-duty closers for high-cycle or windy and drafty conditions, as well as ADA-compliant maximum-force-to-operate closers. A closer’s open cycle compresses the spring and positions the fluid through the open valve for closing. The delay valve allows slower-moving traffic to pass. The closing valve slows closing speed to within 6 inches of the stop. The latching valve accelerates closing for the last 6 inches. Closers need regular adjustment to keep the cycles operating as designed.

    Hinges. (UPVC door window hinges)

    By removing the hinge pins, an attacker can gain access to a facility through a hinged door with window hinge, even when it is locked. Removing a screw and inserting a special pin prevents an attacker from removing the door from its frame, even if door hinge pins are removed.

    Locksets. 

    Deadbolts, knobs, lock cylinders, levers, and entry handsets are wired and wireless devices that operate via remote-open and turn-on devices and cell phone applications. Replacing mechanical keyed locksets with electro-mechanical locks in the same housing is a low-cost upgrade option. Managers are using electronic remote-controlled devices, such as door roller, cameras, motion sensors, and tamper alarms, to give early warning.

    They also can upgrade unguarded remote entry points from mechanical locks and keys to systems that incorporate CCTV and sound. A security guard at a remote point directs the person seeking entry to place his or her badge in front of the camera, verifies the person has the proper clearance and is the same person as shown on the picture badge, and remotely actuates the lock allowing entry.

    In an emergency requiring rapid evacuation of the building, all evacuation route doors with window roller are remotely unlocked immediately and simultaneously from a central control. Other common upgrades include the installation of biometric fingerprint readers, facial-recognition systems, and floor-to-ceiling locked turnstiles.

    Alarms. Radio-wave tamper alarms can be activated by a vehicle or a person moving through and disturbing a radio wave field. The power source sends radio waves through the antenna surrounding anything the antenna touches , including a door, window door hand tools, fence, vehicle, or unattended building. Audio alarms can be attached or silent-connected to a police station or can activate CCTV or access -control systems.

    Cybersecurity. An organization’s access control computer must have no internet route that might allow hackers to take control. Experts advise preventing malware attacks through Wi-Fi that blocks phishing and spear phishing and prevents malware entry into a system. A cybersecurity expert can a wise safeguard against such attacks.

    The list of upgrades might exceed what managers can implement immediately because of cost or time constraints. One effective strategy is to start at the top of the organization’s priority list and work down as far as possible this year, updating the list for budgeting year after year. The main take-away from a successful security strategy is the safety of occupants, but the payback also can include lower lost-opportunity costs and better continuity of normal operations.

big sur – (11.5) Sleep Wake Failure – Hardware or Software?

I just ran into a Sleep Wake Failure on 11.5:

Power button pressed during wake transition after 57409 ms.

Failure code:: 0x00000000 00000027

================================================================
Date/Time:        2021-08-29 10:41:25.444 +0100
OS Version:       ??? ??? (Build ???)
Architecture:     x86_64
Report Version:   32

Data Source:      Stackshots
Shared Cache:     F2DC58FA-E869-380A-8C1E-53D831FB3F9E slid base address 0x7fff20148000, slide 0x148000

Event:            Sleep Wake Failure
Duration:         0.00s
Steps:            1

Boot args:        chunklist-security-epoch=0 -chunklist-no-rev2-dev

Time Awake Since Boot: 10458s



Process:          kernel_task (0)
UUID:             FECBF22B-FBBE-36DE-9664-F12A7DD41D3D
Path:             /System/Library/Kernels/kernel
Architecture:     x86_64
Version:          Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:31 PDT 2021; root:xnu-7195.141.2~5/RELEASE_X86_64
Footprint:        75.48 MB
Time Since Fork:  52701s
Num samples:      1 (1)

  Thread 0x6e    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  mapping_replenish + 470 (kernel + 1670230) (0xffffff80003a7c56) 1
     *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
       *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
         *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x6f    Thread name "IOServiceTerminateThread"    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOService::terminateThread(void*, int) + 228 (kernel + 8113412) (0xffffff80009ccd04) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x80    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  Thread<WorkQueue<EndpointSecurityClient>*>::threadEntry(void*, int) + 27 (EndpointSecurity + 243227) (0xffffff8001c8a61b) 1
     *1  invocation function for block in WorkQueue<EndpointSecurityClient>::create(void (ScopedPointer<EndpointSecurityClient>&&) block_pointer) + 115 (EndpointSecurity + 242195) (0xffffff8001c8a213) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0xa3    Thread name "idle #2"    1 sample (1)    priority 0 (base 0)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  idle_thread + 72 (kernel + 681384) (0xffffff80002b65a8) 1
     *1  processor_idle + 249 (kernel + 680921) (0xffffff80002b63d9) 1
       *1  machine_idle + 746 (kernel + 1800394) (0xffffff80003c78ca) (runnable) 1

  Thread 0xa6    Thread name "idle #4"    1 sample (1)    priority 0 (base 0)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  idle_thread + 72 (kernel + 681384) (0xffffff80002b65a8) 1
     *1  processor_idle + 249 (kernel + 680921) (0xffffff80002b63d9) 1
       *1  machine_idle + 746 (kernel + 1800394) (0xffffff80003c78ca) (runnable) 1

  Thread 0xac    Thread name "idle #1"    1 sample (1)    priority 0 (base 0)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  idle_thread + 72 (kernel + 681384) (0xffffff80002b65a8) 1
     *1  processor_idle + 249 (kernel + 680921) (0xffffff80002b63d9) 1
       *1  machine_idle + 746 (kernel + 1800394) (0xffffff80003c78ca) (runnable) 1

  Thread 0xaf    Thread name "idle #3"    1 sample (1)    priority 0 (base 0)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  idle_thread + 72 (kernel + 681384) (0xffffff80002b65a8) 1
     *1  processor_idle + 249 (kernel + 680921) (0xffffff80002b63d9) 1
       *1  machine_idle + 746 (kernel + 1800394) (0xffffff80003c78ca) (runnable) 1

  Thread 0xb2    Thread name "idle #5"    1 sample (1)    priority 0 (base 0)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  idle_thread + 72 (kernel + 681384) (0xffffff80002b65a8) 1
     *1  processor_idle + 249 (kernel + 680921) (0xffffff80002b63d9) 1
       *1  machine_idle + 746 (kernel + 1800394) (0xffffff80003c78ca) (runnable) 1

  Thread 0xb5    Thread name "idle #7"    1 sample (1)    priority 0 (base 0)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  idle_thread + 72 (kernel + 681384) (0xffffff80002b65a8) 1
     *1  processor_idle + 249 (kernel + 680921) (0xffffff80002b63d9) 1
       *1  machine_idle + 746 (kernel + 1800394) (0xffffff80003c78ca) (runnable) 1

  Thread 0xdc    1 sample (1)    priority 97 (base 97)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  SMCWatchDogTimer::watchdogThread() + 211 (AppleSMC + 63095) (0xffffff8001965677) 1
     *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
       *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
         *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x144    Thread name "AppleANS2Controller"    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOWorkLoop::threadMain() + 280 (kernel + 8246376) (0xffffff80009ed468) 1
     *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
       *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
         *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x145    Thread name "AppleANS2Controller"    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOWorkLoop::threadMain() + 280 (kernel + 8246376) (0xffffff80009ed468) 1
     *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
       *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
         *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x17a    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  swcrypto_threadpool_worker_thread(void*, int) + 568 (apfs + 235678) (0xffffff80033e589e) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x17b    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  swcrypto_threadpool_worker_thread(void*, int) + 568 (apfs + 235678) (0xffffff80033e589e) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x17c    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  swcrypto_threadpool_worker_thread(void*, int) + 568 (apfs + 235678) (0xffffff80033e589e) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x17d    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  swcrypto_threadpool_worker_thread(void*, int) + 568 (apfs + 235678) (0xffffff80033e589e) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x22f    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 6930132) (0xffffff80008abed4) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x4f8    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOCommandGate::runAction(int (*)(OSObject*, void*, void*, void*, void*), void*, void*, void*, void*) + 175 (kernel + 8260271) (0xffffff80009f0aaf) 1
     *1  IOWorkQueue::processWorkCallFromSeparateThreadWL() + 506 (IOBluetoothFamily + 251944) (0xffffff80028ee828) 1
       *1  IOEventSource::sleepGate(void*, unsigned int) + 75 (kernel + 8253963) (0xffffff80009ef20b) 1
         *1  IOWorkLoop::sleepGate(void*, unsigned int) + 188 (kernel + 8248172) (0xffffff80009edb6c) 1
           *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
             *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
               *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
                 *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x4fa    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOCommandGate::runAction(int (*)(OSObject*, void*, void*, void*, void*), void*, void*, void*, void*) + 175 (kernel + 8260271) (0xffffff80009f0aaf) 1
     *1  IOBluetoothPacketLoggerWorkQueue::processWorkCallFromSingleThreadAction(OSObject*, void*, void*, void*, void*) + 45 (IOBluetoothPacketLogger + 8851) (0xffffff80029a1293) 1
       *1  IOBluetoothPacketLoggerWorkQueue::processWorkCallFromSingleThreadWL() + 284 (IOBluetoothPacketLogger + 9146) (0xffffff80029a13ba) 1
         *1  IOEventSource::sleepGate(void*, unsigned int) + 75 (kernel + 8253963) (0xffffff80009ef20b) 1
           *1  IOWorkLoop::sleepGate(void*, unsigned int) + 188 (kernel + 8248172) (0xffffff80009edb6c) 1
             *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
               *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
                 *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
                   *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x4ff    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOCommandGate::runAction(int (*)(OSObject*, void*, void*, void*, void*), void*, void*, void*, void*) + 175 (kernel + 8260271) (0xffffff80009f0aaf) 1
     *1  IOWorkQueue::processWorkCallFromSeparateThreadWL() + 506 (IOBluetoothFamily + 251944) (0xffffff80028ee828) 1
       *1  IOEventSource::sleepGate(void*, unsigned int) + 75 (kernel + 8253963) (0xffffff80009ef20b) 1
         *1  IOWorkLoop::sleepGate(void*, unsigned int) + 188 (kernel + 8248172) (0xffffff80009edb6c) 1
           *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
             *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
               *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
                 *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x598    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  IOCommandGate::runAction(int (*)(OSObject*, void*, void*, void*, void*), void*, void*, void*, void*) + 175 (kernel + 8260271) (0xffffff80009f0aaf) 1
     *1  IOWorkQueue::processWorkCallFromSeparateThreadWL() + 506 (IOBluetoothFamily + 251944) (0xffffff80028ee828) 1
       *1  IOEventSource::sleepGate(void*, unsigned int) + 75 (kernel + 8253963) (0xffffff80009ef20b) 1
         *1  IOWorkLoop::sleepGate(void*, unsigned int) + 188 (kernel + 8248172) (0xffffff80009edb6c) 1
           *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
             *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
               *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
                 *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x974    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1880729) (0xffffff80003db299) 1
     *1  ??? (kernel + 1880942) (0xffffff80003db36e) 1
       *1  ??? (kernel + 1881103) (0xffffff80003db40f) 1
         *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
           *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
             *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
               *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x975    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x976    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x977    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x978    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x979    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x97a    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x97b    1 sample (1)    priority 95 (base 95)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 1882514) (0xffffff80003db992) 1
     *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
       *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
         *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
           *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28d6    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28d7    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28d8    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28d9    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28da    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28db    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28dc    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x28dd    1 sample (1)    priority 81 (base 81)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  smb_rw_thread + 127 (smbfs + 272158) (0xffffff7f9bb8271e) 1
     *1  ??? (kernel + 6430152) (0xffffff8000831dc8) 1
       *1  lck_mtx_sleep + 104 (kernel + 595560) (0xffffff80002a1668) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x22ad3    1 sample (1)    priority 81 (base 81)
  <IO tier 0 and passive>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  tx_flush_thread + 623 (apfs + 1159098) (0xffffff80034c6fba) 1
     *1  ??? (kernel + 6429925) (0xffffff8000831ce5) 1
       *1  lck_mtx_sleep_deadline + 115 (kernel + 596147) (0xffffff80002a18b3) 1
         *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
           *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
             *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Thread 0x2633d    Thread name "thread call high #17"    1 sample (1)    priority 93 (base 93)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 808308) (0xffffff80002d5574) 1
     *1  ??? (kernel + 804357) (0xffffff80002d4605) 1
       *1  IOPMrootDomain::takeStackshot(bool) + 543 (kernel + 8719855) (0xffffff8000a60def) 1
         *1  stack_snapshot_from_kernel + 511 (kernel + 286335) (0xffffff8000255e7f) 1
           *1  DebuggerTrapWithState + 173 (kernel + 514157) (0xffffff800028d86d) (running) 1

  Thread 0x2633e    Thread name "thread call high #18"    1 sample (1)    priority 93 (base 93)
  <IO tier 0>
 *1  call_continuation + 46 (kernel + 139582) (0xffffff800023213e) 1
   *1  ??? (kernel + 808308) (0xffffff80002d5574) 1
     *1  ??? (kernel + 804357) (0xffffff80002d4605) 1
       *1  IOService::pmDriverCallout(IOService*) + 42 (kernel + 8141098) (0xffffff80009d392a) 1
         *1  IOService::driverSetPowerState() + 497 (kernel + 8141713) (0xffffff80009d3b91) 1
           *1  IOCommandGate::runAction(int (*)(OSObject*, void*, void*, void*, void*), void*, void*, void*, void*) + 175 (kernel + 8260271) (0xffffff80009f0aaf) 1
             *1  IOBluetoothHostControllerTransport::setPowerStateAction(OSObject*, void*, void*, void*, void*) + 208 (IOBluetoothHostControllerTransport + 7366) (0xffffff800297bcc6) 1
               *1  IOBluetoothHostControllerPCIeTransport::setPowerStateWL(unsigned long, IOService*) + 1618 (IOBluetoothHostControllerPCIeTransport + 9560) (0xffffff8002975558) 1
                 *1  IOBluetoothHostController::HardResetController(unsigned short) + 1266 (IOBluetoothFamily + 397552) (0xffffff80029120f0) 1
                   *1  IOBluetoothHostControllerPCIeTransport::DoDeviceReset(unsigned short) + 1469 (IOBluetoothHostControllerPCIeTransport + 14457) (0xffffff8002976879) 1
                     *1  IOBluetoothHostControllerTransport::TransportCommandSleep(void*, unsigned int, char*, bool) + 177 (IOBluetoothHostControllerTransport + 11599) (0xffffff800297cd4f) 1
                       *1  IOEventSource::sleepGate(void*, unsigned long long, unsigned int) + 83 (kernel + 8254099) (0xffffff80009ef293) 1
                         *1  IOWorkLoop::sleepGate(void*, unsigned long long, unsigned int) + 191 (kernel + 8249279) (0xffffff80009edfbf) 1
                           *1  lck_mtx_sleep_deadline + 115 (kernel + 596147) (0xffffff80002a18b3) 1
                             *1  thread_block_reason + 175 (kernel + 660159) (0xffffff80002b12bf) 1
                               *1  ??? (kernel + 666402) (0xffffff80002b2b22) 1
                                 *1  machine_switch_context + 203 (kernel + 1768795) (0xffffff80003bfd5b) 1

  Binary Images:
   *0xffffff7f9bb40000 - 0xffffff7f9bbbbfff  smbfs (231.120.2)                                   <C2DCE3D9-7145-3D70-A95D-FBB59D8DE6A7>  /System/Library/Extensions/smbfs.kext/Contents/MacOS/smbfs
   *0xffffff8000210000 - 0xffffff8000c0ffff  kernel (7195.141.2)                                 <FECBF22B-FBBE-36DE-9664-F12A7DD41D3D>  /System/Library/Kernels/kernel
   *0xffffff8001956000 - 0xffffff8001971fff  AppleSMC (589.100.17)                               <842672EB-58AA-3149-BB3E-0A171704B541>  /System/Library/Extensions/AppleSMC.kext/Contents/MacOS/AppleSMC
   *0xffffff8001c4f000 - 0xffffff8001ca4fff  EndpointSecurity (197.140.4)                        <7B217991-DBDF-3856-A7DB-9CA1722667F8>  /System/Library/Extensions/EndpointSecurity.kext/Contents/MacOS/EndpointSecurity
   *0xffffff80028b1000 - 0xffffff8002967fff  IOBluetoothFamily (8005.1.7.1)                      <E4A05B93-E137-3846-9028-3B997A217330>  /System/Library/Extensions/IOBluetoothFamily.kext/Contents/MacOS/IOBluetoothFamily
   *0xffffff8002973000 - 0xffffff8002979fff  IOBluetoothHostControllerPCIeTransport (8005.1.7.1) <AE42616B-0109-3B6C-A92C-B9F5BAE59769>  /System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothHostControllerPCIeTransport.kext/Contents/MacOS/IOBluetoothHostControllerPCIeTransport
   *0xffffff800297a000 - 0xffffff800297ffff  IOBluetoothHostControllerTransport (8005.1.7.1)     <A13CE068-E1C6-3D3A-8D08-6126946D25D6>  /System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothHostControllerTransport.kext/Contents/MacOS/IOBluetoothHostControllerTransport
   *0xffffff800299f000 - 0xffffff80029a6fff  IOBluetoothPacketLogger (8005.1.7.1)                <73C4114C-B6CC-36EF-9320-8583142DDEE9>  /System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothPacketLogger.kext/Contents/MacOS/IOBluetoothPacketLogger
   *0xffffff80033ac000 - 0xffffff8003526fff  apfs (1677.141.1)                                   <242980A5-2BD9-3F6C-85A9-59DC3D26221C>  /System/Library/Extensions/apfs.kext/Contents/MacOS/apfs
   *0xffffff80035fc000 -                ???  ???                                                 <5E977058-687E-36A0-9AED-3BDE47B80C97>
Model: MacBookPro16,3, BootROM 1554.140.20.0.0 (iBridge: 18.16.14759.0.1,0), 4 processors, Quad-Core Intel Core i5, 1.4 GHz, 8 GB, SMC
Graphics: kHW_IntelIrisGraphics645Item, Intel Iris Plus Graphics 645, spdisplays_builtin
Memory Module: BANK 0/ChannelA-DIMM0, 4 GB, LPDDR3, 2133 MHz, Samsung, K4E6E304ED-EGCG
Memory Module: BANK 2/ChannelB-DIMM0, 4 GB, LPDDR3, 2133 MHz, Samsung, K4E6E304ED-EGCG
AirPort: spairport_wireless_card_type_airport_extreme, wl0: Jul  7 2021 03:22:32 version 16.50.21.0.3.6.102 FWID 01-d1a61353
Bluetooth: Version 8.0.5d7, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
USB Device: USB 3.1 Bus
USB Device: Apple T2 Bus
USB Device: Touch Bar Backlight
USB Device: Touch Bar Display
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Headset
USB Device: Ambient Light Sensor
USB Device: FaceTime HD Camera (Built-in)
USB Device: Apple T2 Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 63.5

Is this a software issue or a hardware one?

❕NEWS – Jack Dorsey confirms that he is building a Bitcoin hardware wallet | NewProxyLists

Maybe fintech can use its wallet to store its own 8000+ BTC. Square CEO Jack Dorsey today confirmed via Twitter (another company he manages) that the payment company intends to have a hard wallet. Build software. Jesse Dorogusker, Square’s head of product development, first tweeted that the company “has decided to build a wallet and hardware service to make Bitcoin the mainstream.” Dorsey retweeted it, adding: “We do.

linux – How to configure dnsmasq to identify hosts using mac address instead of hardware address?

I have a problem with dnsmasq on Arch Linux.
dnsmasq assigns the same IPv4 address to different hosts with different hostnames and MAC addresses, BUT the same hardware address. The hardware address is same because the hosts are cloned virtual machines that are identical excluding hostnames and mac addresses.
I can’t change the hardware addresses, so I want to configure dnsmasq to identify the hosts using MAC address or hostname at least. Is it possible?
Hope for your help!

mining hardware – How much can I make monthly with 4 Xeon cores?

If you’re asking about mining bitcoin, the answer is: nothing at all. General purpose Bitcoin mining has been unprofitable since 2013, and completely bonkers today.

Nicehash however does not mine bitcoin; it mines various altcoins, sells the mining proceeds to those who bid for them, and pays you the proceeds in bitcoin. The profitability of that is something I’d consider off-topic for this site, as it wildly depends on the various market conditions around those altcoins.

Custom hardware mining on a block header

I am looking for a hardware miner that would allow me to send it a block header and it would loop through the nonce performing hashing and return either a success with the nonce number or fail (once it runs over all nonce numbers). For example, I have my custom mining software running on my PC and it would use a usb-connected ASIC miner to perform this type of hash search. (I am a complete newb to mining, apologies if this question is ignorant.)

Need Advises on Updating MySQL Database(Both software and hardware)

I have three in production MySQL database (5.7) with about 160GB of Data. The largest table is about 20GB, and the largest schema is about 40GB. I think all tables are innodb table. Currently I don’t know about the configuration of the MySQL server machine. And I was asked to purchase a new server to replace the old one. This database is really slow and cannot hold more than 100 connections. I used this query to get the max_memory:

SELECT ( @@key_buffer_size
+ @@query_cache_size
+ @@innodb_buffer_pool_size
+ @@innodb_log_buffer_size
+ @@max_connections * ( 
    @@read_buffer_size
    + @@read_rnd_buffer_size
    + @@sort_buffer_size
    + @@join_buffer_size
    + @@binlog_cache_size
    + @@thread_stack
    + @@tmp_table_size )
) / (1024 * 1024 * 1024) AS MAX_MEMORY_GB;

And It gives me 54.7040(GB) as result. I assume this could be close to the server’s physical RAM size? One thing I feel strange is the the innodb_buffer_pool_size is only around 4GB. With this query: SHOW VARIABLES LIKE 'innodb_buffer_pool%';

The result is.

innodb_buffer_pool_instances    1
innodb_buffer_pool_size 4294967296

I think this is misconfigured. Am I right? I’m planning to purchase an 64 core CPU with 512 GB of RAM to host it. And I’m planning to upgrade them from MySQL 5.7 to 8.0. Will this becomes a huge performance bump? And do you guys think I should combine the three databases into one on the new server or still host three database instance? And if I combine them into a one database. What will be the reasonable buffer_pool_size that I need to set. I’m new to database, so my question might be silly. Thanks for your help and advises!

Patriot Burst SSds any experience with them on servers in hardware raid?

I been using Crucial mx500s and they work fine, but need to change them out about every year just keep safe on nand wear on the hosting serv… | Read the rest of https://www.webhostingtalk.com/showthread.php?t=1855130&goto=newpost

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