Anonymous_User Absent Member.
Absent Member.
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NSS Rebuild takes al long time

Hi,

I had to do a NSS /Poolruild action because of the following error

pool DATA: System data error 20012(beastTree.c[506]). Block 39321077(fileblock -39321077)(ZID 1)

The pool is 512GB and the space in use is about 38%. The pool is on a fibre attached HP MSA1000.

It took over 12 hours to rebuild this pool with an average of 476 System Objects Processed/sec, 98 Disk Blocks Read/sec and 35 Disk Blocks Written/sec.

I've done a few rebuilds some years ago (NSS 2.x on NetWare 5.1) and noticed then that the progress of the rebuild action runs until free space is reached, so in the situation above; the progressbar went on to 38% and then went straight to 100%. But in this particular case it was very slow all the way up to 100%.

Is it normal that a 500GB pool takes such a long time to rebuild (NetWare 6.5 SP3 with post patches)?

Thanks in advance,
Jacco

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Anonymous_User Absent Member.
Absent Member.

Re: NSS Rebuild takes al long time



Data point:

170 GB volumes, Compaq ML530 with 2 1000 Mhz procs, a 5300 controller,
an external cage, and the array configured as RAID 5. A fairly full
volume (%95 or so) rebuild took about 3 hours. Volumes less utilized
(%60-%70) have taken about an hour or so.

170/3 is about 60 GB/hour, 80GB/hour for the other volumes. This was
NW6.0 but it shouldn't be that different from the software perspective.
hardware power is the much bigger determinant of time.


--
Cheers!
Richard Beels
~ Network Consultant
~ Sysop, Novell Support Connection
~ MCNE, CNE*, CNA*, CNS*, N*LS


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Anonymous_User Absent Member.
Absent Member.

Re: NSS Rebuild takes al long time

Richard wrote:
> Data point:
>
> 170 GB volumes, Compaq ML530 with 2 1000 Mhz procs, a 5300 controller,
> an external cage, and the array configured as RAID 5. A fairly full
> volume (%95 or so) rebuild took about 3 hours. Volumes less utilized
> (%60-%70) have taken about an hour or so.


I had to rebuild an 800GB pool yesterday, 14.5 hours. CPQ DL 380; NW6
cluster, MSA1000 SAN.

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Anonymous_User Absent Member.
Absent Member.

Re: NSS Rebuild takes al long time


that's about 55GB/hour. how much free space on the volume?


--
Cheers!
Richard Beels
~ Network Consultant
~ Sysop, Novell Support Connection
~ MCNE, CNE*, CNA*, CNS*, N*LS


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