I stop schedule backup and manual backup. While TSM client implement backup,
it stop tranferring file immediately. I query TSM server and see :
- q volume :
Disk pool : Pct Ultil 80%
Volume Status : On-line
- q session :
Sess state : MediaW
-q process : migration process is still running.
later ten minutes, I check again and see Session state : "MediaW"
I use LTO GEN2 and its read/write speed is 10-20 MB/s native and 20-40 MB/s
compressed as producer said. The speed is more than LAN speed. I think if I
backup directly to tape with this speed it is suitable. But I only see
network tranfer rate is very low (about 1-2 MB/s).
Is there method to improve peformance of TSM server ?
----- Original Message -----
From: "Tab Trepagnier" <Tab.Trepagnier AT LAITRAM DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Tuesday, March 08, 2005 7:30 AM
Subject: Re: migration and backup
> Iain,
>
> I run small disk pools also, and I also had HI=0 for a while. That's not
> a good idea because you prevent TSM from combining data into a internal
> package prior to migration. We saw files as small as 1 KB migrating. That
> forces your TSM server to track a HUGE number of objects.
>
> Now, on our smallest disk pools (5 to 6 GB) we set HI=10 so that migration
> doesn't begin until 500-600 MB of data has been committed. Much better
> performance.
>
> We also set a 1 GB max size so that if a client sends a very large file -
> say 3 GB - it goes straight to tape.
>
> Tab Trepagnier
> TSM Administrator
> Laitram, L.L.C.
>
>
>
>
>
>
>
> Iain Barnetson <Iain.Barnetson AT HALLIBURTON DOT COM>
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> 03/04/2005 04:24 AM
> Please respond to
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
>
> To
> ADSM-L AT VM.MARIST DOT EDU
> cc
>
> Subject
> Re: migration and backup
>
>
>
>
>
>
> I'm in a similar situation where my primary stg diskpool is not big
> enough to contain a nights backups. I have the migration set to hi=0
> lo=0. This means it's constantly migrating but I've 6 dedicated lto2
> tape drives so isn't an issue for me.
>
>
> Regards,
> Iain
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
> Of
> John Naylor
> Sent: 04 March 2005 10:17
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] migration and backup
>
> Your disk pool is way too small.
> It should be large enough to hold one night's backups If you can't do
> that, set your hi mig threshold to a low value say 10 or even lower At
> 80% your backup fills up the remaining 20% of your pool faster than
> migration can empty it.
>
>
>
>
>
> nghiatd <nghiatd2 AT fpt.com DOT vn>
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
> 04/03/2005 10:15
> Please respond to
> "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
>
>
> To
> ADSM-L AT vm.marist DOT edu
> cc
>
> Subject
> migration and backup
>
>
>
>
>
>
> Hi all,
>
> I setup TSM ver 5.2 client on Win 2K that has more than 200 GB data, But
> TSM server machine only 20 GB hard disk. So I configure Backuppool
> ---> Diskpool --->Tapepool.
>
> Diskpool : 18 GB
> High Migration Threshold : 80 %
> Low Migration Threshold : 0 %.
>
> People said when migration process is started, backup process is still
> continuous.
> But I view log file ;
>
> 02/03/2005 06:22:26 Normal File--> 719,648,279 \\BILL2_200411_2.tar *
> Unsuccessful*
> 02/03/2005 06:22:26 A1114I Waiting for mount of offline media.
> 02/03/2005 06:55:37 Retry # 1 Normal File--> 719,648,279
> \\BILL2_200411_2.tar [Sent]
> 02/03/2005 06:55:37 ANS1809W Session is lost; initializing session
> reopen procedure.
> 02/03/2005 06:55:53 ... successful
> 02/03/2005 06:56:16 Normal File--> 726,513,573 \\BILL2_200411_3.tar
> [Sent]
>
>
> So backup was stopped when migration process is started.
>
> Does anyone have idea to backup process still continue ?
>
> Nghiatd
>
>
>
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