Data Transfer Speeds

[Botox77]

Hi all,

I am using VSphere 4.1. Everything is on GB, (ESX, SAN , Switches etc)

If I copy one large file between servers or my machine to server I am getting 100MB/Sec +

However if I copy directories containing 1000's files between the same servers, I am getting between 3MB and 6MB per second.

I understand copying smaller files will always be slower, but surely this cant be right?

Does anyone have any ideas?

Many thanks

[Botox77]

Just to add, I have tested copying from my machine to a physical serevr and the transfer speeds are fine.. around 50MB/sec for large directories.

So def problem with VM's

[sivaksk147]

Change your network speed to auto negosiate.. you may fee the difference,  and also give a try to change storage policy to fixed. incase if it is round robin

[Botox77]

Thanks for your input, all adapters are set to auto and storage is set to fixed.

Any other ideas. Its strange that the speed of large files is perfectly fine.

[Botox77]

Anyone else have any ideas?

[haiiampc]

It's always true --> More number of smaller files invovles more number of File allocation Talbe Entries (check access permissions for every file before copy)

For example --> 1GB Single file - may take 10min (1GB Aggregrate of 1000 Files) --> may take many folds than 10min..

Nothing related to speed settings here.. it's matter of making more FAT entries.. same happens on Plain physical servers - have a try.

Regards - Purna.