On Tue, 10 Jul 2007, Kennedy, Cameron wrote:

> Hi,
> Anyone have some experiences to share about getting maximum throughput
> from their EV backups?
>
> We have Netbackup 5.3mp4 running on AIX with 1 AIX media server,
> We have Enterprise Vault (Windows 2003 NTFS) with a GB backup LAN.
> I am struggling to get greater than 2500KB/sec backup speed from our
> vault stores partition.
> I know that the greatest issue is that this partition has many tiny
> files and that this adds overhead in backing up them up.
>
> Example: We have right now 606GB consisting of ~983000 files on this
> partition alone.
>
> I get a throughput of ~2500KB/s according to the Netbackup console but I
> would say it is a little lower based on my math.
> I have turned off VSP caching, which did help by ~1500KB/s.
> We have turned on the EV collector which should go about collecting the
> small files into larger CAB files, however, I am still seeing long
> delays in the time it takes for backups.
> During testing, I have found that I can kick off a new stream and backup
> another partition on the same server and get a throughput of 10,000KB/s
> which leads me to believe it is not a network related setup issue.
>
> Is there anything else that someone has done to increase throughput, or
> can anyone share what type of performance they are getting?
> I am considering a flashcopy scenario of the SAN disk associated with
> this server which won't fix the issue, but atleast move it from the
> production server to an offline situation.
> I am also considering, doing a raw partition backup (haven't used this
> method before but read about it in the admin guide), knowing that only a
> restore of the entire partition would be an option in a DR situation.
>
> thanks for any advice.
>

You mean 5.1MP4?  Perhaps that filesystem is highly fragmented?  That is
a lot of files too, you may want to look into flash backup?

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