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Dump is much faster than restore [message #23567]

Tue, 20 November 2007 12:39

dagr
Messages: 83
Registered: February 2006

Member

I played around online migration and noticed that

vzctl restore $name --undump --dumpfile img_file takes about 2.5 s (on another host) , whereas

chkpnt $name --dump --dumpfile img_file - only 0.2s .

Is it normal behaviour ? (2.6.18-8.1.15.el5.028stab047.1PAE)

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Re: Dump is much faster than restore [message #23625 is a reply to message #23567]

Wed, 21 November 2007 09:21

vaverin
Messages: 708
Registered: September 2005

Senior Member

IMHO both times are very nice Smile

It may be due follwing reasons:
- chkpnt kills processes, and it is obviously faster than new process creation;
- vzctl restore starts some network configuration on Hardware Node (adds routes for VE IP, send ARP) before undumping.

thank you,
Vasily Averin

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