ADSM-L

Slow backup from Netware of small files

2004-04-27 05:05:13
Subject: Slow backup from Netware of small files
From: Eric Winters <ewinters AT AU1.IBM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 27 Apr 2004 18:46:57 +1000
Dear All,

ENVIRONMENT
==============
TSM Server 5.2 on AIX 5.1
TXNGROUPMAX                     256
TCPWINDOWSIZE                  64


TSM Backup/Archive Client 5.2 on Netware 5
TSANDS.NLM ver 10110.95
TSA500.NLM ver 5.05d
SMDR.NLM ver 6.50c
TCPWINDOWSIZE                      64
TCPBUFSIZE                                 32
LARGECOMMBUFFERS           NO
TXNBYTELIMIT                            25600
PROCESSORUTILIZATION    10
RESOURCEUTILIZATION         5

Gigabit Network

PROBLEM
=========
Whilst backup performance of large files is very good (approx 16 MB/s) the
backup performance of small files (50 KB to 300KB) is extremely poor (300
KB/s).
Backups are straight to a diskpool.
I'd be interested in hearing from anyone with any experience of successful
backup of small files in a Netware environment, or anyone who has any ideas
as to what might be done to improve the situation.

Thanks as always,


Eric Winters
Sydney
Australia

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