Asymmetry in Linux VM transfer rate

I have two Linux VMs, let’s call them VM1 and VM2.
I have on VM1 an 80 Gb file.
When I try to transfer this file from VM1 to VM2 the transfer rate is almost 256 Mb/s.

scp 80Gblargefile VM2:/home/myuser

Then I remove the file from VM1 and, always in VM1, I try to copy back it from VM2:

scp VM2:/home/myuser/80Gblargefile .

In this case, the transfer rate is 46 Mb/s.

The transfer always occurs on the same network interface.

I would like to understand if it is normally a situation like this. If no, what I can do to debug the problem? I suspect there is a problem with a kernel parameter or network configuration. But I don’t know what to check.

I verified with traceroute there is one hop between the two VMs. Moreover, I tested the bandwidth with iperf From VM2 (as a server) and VM1 and I got:

( ID) Interval       Transfer     Bandwidth
(  4)  0.0-10.0 sec  14.8 GBytes  12.7 Gbits/sec

I did also the reverse:

( ID) Interval       Transfer     Bandwidth
(  3)  0.0-10.0 sec  14.7 GBytes  12.6 Gbits/sec

how to transfer app data from any android to any android without using google’s servers?

I want to transfer all apps from one android phone to another android phone, and I want to keep all app data (i.e. keep access to the account), not install them from scratch, but without using Google’s service.

From Android 8.0 to Android 10, possibly without root.

What options are available?


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bitcoin core – How can I transfer unconfirmed transactions from wallet.dat to a new blockchain wallet

My question may not be very clear since I’m not really an expert in bitcoin and its technology. But in my possession I have just a wallet.dat files with an unconfirmed transaction on it.

I followed a procedure of spending the unconfirmed Bitcoin from the wallet.dat wallet into a new blockchain wallet address.

At this level I have linked the wallet.dat with my bitcoin core, and even checked the wallet.dat balance on bitref and it shows the bitcoins is unspent but unconfirmed.

This is where I’m confused

  • available balance on my Bitcoin core is 0.00000 and blocks not yet fully syncd.
  • I tried using the JSON process of spending the bitcoins into a new blockchain wallet, after putting all I was asked in the process I got what you will see below.

E2 -> Error Parse error on line ‘1’ parse error on line^
Expecting‘STRING’, ‘NUMBER’, ‘NULL’, ‘TRUE’, ‘FALSE’
‘{‘, ‘[‘, got ‘undefined

And left me with no option than OK.
My bitcoin core version is

I don’t know if my question does makes sense but that’s what I’m facing please some should help me

How to transfer BTC from desktop wallet to mobile wallet (without fees), say using Electrum or Bitcoin Core

I have both Bitcoin Core & Electrum wallets installed on both my desktop & mobile. How do I transfer BTCs from respective desktop to mobile wallets (& vice-versa) directly (i.e., not thru the blockchain) to avoid fees?

Transfer Lightroom watermark and export settings to new computer

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mac os x – What method is used to transfer files other than photos from Android (Pixel) to Mac (Osx)

What method is used to transfer files from Android to Mac? Specifically files other than photos /videos/music, e.g. sound recordings,text downloads,contacts vcf file, etc.

There should be no problem transferring other files using Android File Transfer

Does the registry (Nominet) have a 60 day waiting period for domain transfer? (the registry behind do not have any explicit terms on transfers of domains, unless the domain is “expired” or “suspended” (from 30 days after expiry, lasts for 60 days). Domains in these statuses would need to be renewed prior to them being transferred.

From the .UK Registry-Registrar Agreement 26 May 2020, section B.1.15:

You may not transfer a domain name during the expiry period, except as set out in paragraph E.3.6

However, some registrars do seem to enforce a 60 day limit on transfers, for example GoDaddy’s rules on transferring out state:

You won’t be able to transfer your domain away if it’s within 60 days of registration or a previous transfer, if a 60-day lock was applied after updating domain contact information, or if your domain has Ownership Protection.


Note Option showing disabled? You can’t transfer your domain if it’s within 60 days of registration or a previous transfer, if a 60-day lock was applied after updating domain contact information, or if your domain has Ownership Protection.

Fasthosts also state:

You can transfer, .uk,,, and domain names away from Fasthosts, provided that the domain name has been registered for at least 60 days.

Which seems to imply that you can transfer a domain within 60 days of another transfer, but not from the initial registration.

However, other registrars, such as namecheap will follow the registry guidelines and allow for immediate transfers.

algorithms – How could a bank software intend to transfer $82.56 but result in a error transfer of $1,205,619.56

algorithms – How could a bank software intend to transfer $82.56 but result in a error transfer of $1,205,619.56 – Software Engineering Stack Exchange

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