Re: [ADSM-L] Antwort: [ADSM-L] LanFree very low performance

A couple questions 

1) How is this 5TB laid out, 1,2,3,4 or more file systems?  

2) How many streams do you see when the backup is running? (Resource 
utilization / mutli streaming is by File System for flat file backups.

3) Are the tape drives on dedicated HBA's? 

4) Are you sure that the Data is going over the fibre?  If not configured 
properly TSM will automatically direct the backups over the LAN (sounds right 
for 70MBS)

Charles 




-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
David McClelland
Sent: Tuesday, November 23, 2010 8:14 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Antwort: [ADSM-L] LanFree very low performance

Peppix,

It may be helpful if you are able to send to the list the output of a backup 
session summary report from the client for a backup operation which exhibited 
this poor performance.

Rgds,
______________
David Mc,
London, UK


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Ullrich Mänz
Sent: 23 November 2010 14:09
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Antwort: [ADSM-L] LanFree very low performance

Hi peppix, 

you are using incremental backup for an offline database backup. I wonder, how 
you deal with 5 tape drives. Normally, backup incremental is using one session 
per mountpoint. set max. number of mountpoints in node definition for 
parallelism. 

The throughput reported is ok for single session backup via LAN, It is slow for 
a large file backup via LANfree for a completely fibre channel based RAID 
system, but acceptable for SATA storage. 

Have a look at your storage environment and node definitions with respect to 
the directory layout of the database environment.

regards
Ulli

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System-Integration

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Von:    peppix <tsm-forum AT BACKUPCENTRAL DOT COM>
An:     ADSM-L AT VM.MARIST DOT EDU
Datum:  23.11.2010 00:25
Betreff:        [ADSM-L] LanFree very low performance
Gesendet von:   "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>



Hi all,
I'm trying to backup an oracle db (5TB) by lanfree, but the transfer speed is 
70 mb/s (over 5 drives)!! The db is offiline so I use the incremental backup.

The client configuration (v.5.5.2.2):

SErvername  XXXXXXXXX
   COMMMethod                TCPip
   TCPPort                       1500
   TCPServeraddress          XXXXXXX
   DISKBUFFSIZE               1023
   TCPWindowsize              1024
   TCPBUffsize                   512
   passwordaccess             generate
   nodename                     XXXXXXX
   RESOURCEUTILIZATION   10
   TCPNOdelay                  YES
   TXNByteLimit                 2097152
   LargeCommBuffer           NO
   CommRestartDuration     5
   CommRestartInterval      15
   schedmode                   prompted
   managedservices           schedule webclient
   ERRORlogname               /usr/tivoli/tsm/client/ba/bin/dsmerror.log
   ERRORlogrete                7 D
   SCHEDlogname              /usr/tivoli/tsm/client/ba/bin/dsmsched.log
   schedlogrete                 7 D
   inclexcl /usr/tivoli/tsm/client/ba/bin/inclexcl.lst
   enablelanfree                yes
   LANFREECommmethod     TCPIP
   LANFREETCPPort            1500


Server configuration (v.5.5.4.0):
   COMMmethod         TCPIP
   TCPPort                1500
   TCPWindowsize      1024
   TCPBufsize            32
   TCPNODELAY         YES
   COMMmethod         HTTP
   HTTPPort              1580
   COMMmethod         SHaredmem
   SHMPort               1510
   IDLETimeout          2880
   LANGuage             en_US
   DATEformat           2
   TIMEformat           1
   NUMberformat        5
   EXPInterval           0
   MIRRORREAD LOG       NORMAL
   MIRRORREAD DB         NORMAL
   MIRRORWRITE LOG     PARALLEL
   MIRRORWRITE DB       SEQUENTIAL
   VOLUMEHistory          /tsmdblog/config/volhistory.txt
   VOLUMEHistory          /usr/tivoli/tsm/server/bin/volhistory.txt
   DEVCONFig               /tsmdblog/config/devconfig.txt
   DEVCONFig               /usr/tivoli/tsm/server/bin/devconfig.txt
   BUFPoolsize              32768
   LOGPoolsize              4096
   TXNGroupmax           256
   MOVEBatchsize         1000
   MOVESizethresh        1024
   tcpnodelay              YES
   DNSLOOKUP             NO
   COMMTIMEOUT        14400
   MAXSESSIONS         80
   SANDISCOVERY        ON

Considerations:
- 12 drives installed in the library
- SAN and TSM work good (with the same tsm server in the same SAN I backup a 
lot of SAP by TDP at 300MB/s)
- all server backupped by incremental have the same problem (same configuration 
but different san switch and different hba).

Can you help me please?
thanks,
best regards

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