ADSM-L

Re: Node very very slow for incremental backup

2003-06-03 15:00:09
Subject: Re: Node very very slow for incremental backup
From: Alan Whitmore <whitmora AT SAOL DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 3 Jun 2003 20:43:42 +0200
You may want to change your TCPWindowSize   from 63 to 1024

----- Original Message -----
From: "David Rigaudiere" <david.rigaudiere AT FR.ABNAMRO DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Monday, May 26, 2003 3:36 PM
Subject: Node very very slow for incremental backup


Hi *SMers,
I have a probleme whit a node.

Client 4.2.1.15 WinNT
Server 5.1.6.3  AIX

This node is very very slow to backups.
14H for less 6GB !! (1H is a normal backup time)

The sysadmins said "no change on this node"

I can't find where is the probleme, the node
spent a lot of time to browse files and directories.

A performance analyse when node is backuping does not
show a bottleneck (memory, CPU, I/O ...)
I tested a selective or big restore, without problem.
(Data transfer rate: 10,000 to 12,000 KB/sec)

Maybee I must install journal based backup but "yesterday"
it worked perfectly without it...

you're my only hope, do you have an idea ?


dsm.opt :
=========

TCPWindowSize    63
TCPBuffSize      31
TCPNodelay       YES
SubDir           YES
Compression      YES
CompressAlways   NO
SchedMode        Polling      * (behind Firewall)




It is a session report :
========================

Total number of objects inspected:  192,386
Total number of objects backed up:    2,221
Total number of objects updated:          8
Total number of objects rebound:          0
Total number of objects deleted:          0
Total number of objects expired:        523
Total number of objects failed:           0
Total number of bytes transferred:     5.89 GB
Data transfer time:                1,416.29 sec
Network data transfer rate:        4,362.30 KB/sec
Aggregate data transfer rate:        119.69 KB/sec
Objects compressed by:                   15%
Elapsed processing time:            14:20:17




and a trace report :
====================

Section Total    Time(sec)    Average Time(msec)    Frequency used
==================================================================
Client Setup         0.344                344.0                  1
Process Dirs     50292.881               2250.6              22346
Solve Tree           0.000                  0.0                  0
Compute              2.677                  0.0             304175
Transaction         46.145                  0.0             938009
BeginTxn Verb        0.047                  0.1                508
File I/O           164.261                  0.7             241799
Compression        372.440                  2.3             164443
Encryption           0.000                  0.0                  0
Delta                0.000                  0.0                  0
Data Verb            0.297                  8.3                 36
Confirm Verb         0.297                  8.3                 36
EndTxn Verb        541.249               1065.5                508
Client Cleanup       2.735               2735.0                  1




--
David  Rigaudiere  -+-  Administration  TSM  -+-
Paris -+- 40, rue de Courcelles -+- 4e itage -+-
david.rigaudiere AT fr.abnamro DOT com -+- 01.5621.7802

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