UNSOLVED
Directive mode VS backup speed
Hi
I have Two kinds of Backup mode,one is san backup and the other is network backup.Both clients are Unix Server and have one Unix server as backup server. i have tried backup the OS in the "Unix with compression directive" and "Unix standard directives"
The san and network backup clients`s both can compress the quantity as 1/2 but the san backup costs the same time when the network backup clent`s only costs 1/2 time of "Unix standard directives".
for example "A" server is san backup and backup 20G file costs 20min."B" server is network backup and backup 20G file costs 40min when the directive mode is "Unix standard directives"
when use "Unix with compression directive" ,"A" will backup 10G using 20min,and "B" backup 10G using 20min.
i wonder why this happen?
Best regards~~
I have Two kinds of Backup mode,one is san backup and the other is network backup.Both clients are Unix Server and have one Unix server as backup server. i have tried backup the OS in the "Unix with compression directive" and "Unix standard directives"
The san and network backup clients`s both can compress the quantity as 1/2 but the san backup costs the same time when the network backup clent`s only costs 1/2 time of "Unix standard directives".
for example "A" server is san backup and backup 20G file costs 20min."B" server is network backup and backup 20G file costs 40min when the directive mode is "Unix standard directives"
when use "Unix with compression directive" ,"A" will backup 10G using 20min,and "B" backup 10G using 20min.
i wonder why this happen?
Best regards~~
- Thanks Crvelin for your reply
But in my case two clients have the same HW(alpha GS1280) with the same data kind(as the compression rate is same).and my target library is STK L700 using LTO-2 tape.
i wonder what do you mean hardware compression?you mean the tape device name with "_d1"?
thanks
ble1
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Posted November 29th, 2006 00:00