[Networker] Antw: Slow Performance for large file system

Hy Randy,

Networker slow down on hugh filesystems filled up by small files only. We 
discovered the same 
on 280 GB UNIX Filesystems as well es on Novell Filesystems consist of small 
files only
(and small means only some KB each file.) Don't know how to solve this. May be 
using some 
kind of snapshot functionality could solve the problem. Especially for our 
Novell-environment 
we tested Backup-express. The performance was incridible good, (6 to9  MByte/s 
compare 
to 300 KByte/s) but from the cost point of fiew now way for changing our 
environment.

Regards Thorsten Linow

UNIX SYS-Admin; Backup & Recovery
Talkline GmbH & CO KG
See You @ www.talkline.de


>>> Randy Doering <rdoering AT COMCAST DOT NET> 20.07.04 02:21:45 >>>
Greetings, I've read some of the archives regarding slow performance using
Legato, and haven't seen this particular case.

Environment: AS ES45 (Tru64 v5.1b) with StorageWork SAN, MSL5000 SDLT.
Networker version 7.1.1.

File System: 1.4 TBs with 46+M Files - Local to the Legato server - no
network involvement.

The backup starts out (started on Friday at 18:30) and goes along around 20-
22/MBs. Then proceeds to start slowing down (8-10/MBs); down to 96-450/KBs
since yesterday afternoon to currently.

It has actually been on the same 160GB tape since last night.

Are there any Legato tuning hints that could be of use with this file
system?

Thanks,
Randy

PS: This is the same file system that I had previously reported an Advfs
file domain crash on and subsequently receive an HP patch for the condition.

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[Networker] Antw: Slow Performance for large file system - Suggestions?
