Re: [Networker] Index File Size?
2006-07-28 04:28:59
The indexes in NetWorker 5 were based on a single, monolithic index for each
client. That hurt performance all round. From NetWorker 6, each backup
creates its own index file. This way, rather than having to read that half
terrabyte index file which John may have had with NW 5, NW 6+ maybe needs to
read a 400MB file for the full backup followed by 3x50MB files to recover files
from an incremental backup. Works out much more efficient and, AFAIK, has been
rock solid in terms of reliability since 6.0.1.
The size of the directories will also be based on the browse period of the
files. Give everything a 10 year browse time and your indexes will quickly
grow to massive sizes. The only real downside in terms of NW performance for
something like that would be the number of files in the index directory causing
performance problems with the getdents() call that's used to get the contents
of the directory, and that's a filesystem issue rather than a problem with
NetWorker.
Cheers,
Stuart.
________________________________
From: Legato NetWorker discussion on behalf of Shyam Hegde
Sent: Thu 27-Jul-06 21:43
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Index File Size?
Thats nice to hear, however Stan's test shows that recovery prformance is
not affected because of larger index size! interesting....
**BACKUP IS ONE THING, RECOVERY IS EVERYTHING**
On 7/28/06, John Stoffel <john.stoffel AT taec.toshiba DOT com> wrote:
>
>
> Heh, that's nothing, I've got a server with one client index that's
> 147G in size. And nother one thats 538G in size.
>
> Lots of itty bitty files will do that to you. Sigh...
>
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