Hi Sandeep
If your hardware is working correctly, and tape operations from the TSM server
shows good performance, I can only imagine two possible reasons for the low
throughput:
a) The disks connected to your Domino server isnt able to push the necessary
MB/s to the tape drives thus creating start/write/stop/rewind/write/stop/rewind
(and so on) sequences on your tape drives, a.k.a shoeshine effect.
b) Your Domino server contains alot of small files. LAN-free to tape drives is
only a benefit when transfering large chunks of data at a time, since all the
meta data goes over the LAN anyway. So having a large amount of small files is
certainly gonna give you shoeshine on your tape drives. This only goes for
LAN-free to tape drives. For a file device class, you wont suffer throughput
loss, but the metadata will still be sent over the LAN.
Best Regards
Daniel
Daniel Sparrman
Exist i Stockholm AB
Växel: 08-754 98 00
Fax: 08-754 97 30
daniel.sparrman AT exist DOT se
http://www.existgruppen.se
Posthusgatan 1 761 30 NORRTÄLJE
-----"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> skrev: -----
Till: ADSM-L AT VM.MARIST DOT EDU
Från: Sandeep Jain <sandeep.jain AT DCMDS DOT COM>
Sänt av: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
Datum: 05/18/2011 09:01
Ärende: Re: Ang: tdp for domino LAN free backup poor performance
Hi Daniel
TDP through LAN takes 38 hours and LANfree takes 30 hours.
I am also working on the OS/HARdware performance factor, I am too having
doubt that the read I/O is slow...
We are having HP server
ProLiant DL180 G6
, windows 2003 64Bit ,
OS WIN2k3 64_bit Ent Ed.
> Lotus. 8.5.2
> TDP for mail 5.5.3
> Storage agent 5.5
> Version of ibmtape device driver on the Domino windows host that controls
> tape drives---6.2.1.5
Regards
Sandeep
----- Original Message -----
From: "Daniel Sparrman" <daniel.sparrman AT EXIST DOT SE>
To: <ADSM-L AT vm.marist DOT edu>
Sent: Wednesday, May 18, 2011 10:20 AM
Subject: [ADSM-L] Ang: tdp for domino LAN free backup poor performance
> Hi
>
> First off, there are several things that affect the performance except for
> just the optfile, software versions and your operating system:
>
> * What speed are you having making the backup over the LAN?
> * How fast are the disks on your Domino server, are they able to transfer
> data at the speeds your tape drives are writing?
> * How large are the files on your Domino server (average) ?
> * What's the version of the IBMtape driver on your Domino host? The
> version on your TSM server (which controls the library) really doesnt
> affect read/write performance since it only controls the robotics.
>
> Have you verified that the backup is actually being done across the SAN
> and not the LAN? 700GB in 30 hours is 23MB/s, which more looks like a
> slower than average LAN backup over gigabit ethernet.
>
> If your Domino server cant deliver data to the tapes drives with enough
> speed, you'll end up with a shoeshine effect, which will seriously reduce
> performance. Since you're using IBMtape, I'm assuming you're using some
> sort of LTO drives. If you for example have a LTO3 drive, it will write
> data @ 80MB/s natively. If your host only delivers data at 40MB/s, you
> will have a drive that is spending more time rewinding than actually
> writing the data.
>
> Some more information about your environment (hardware on both client &
> server incl tape technology, your TDP configuration file) would be helpful
> in determining the error.
>
> Best Regards
>
> Daniel Sparrman
> Exist i Stockholm AB
> Växel: 08-754 98 00
> Fax: 08-754 97 30
> daniel.sparrman AT exist DOT se
> http://www.existgruppen.se
> Posthusgatan 1 761 30 NORRTÄLJE
>
>
>
> -----"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> skrev: -----
>
>
> Till: ADSM-L AT VM.MARIST DOT EDU
> Från: Sandeep Jain <sandeep.jain AT DCMDS DOT COM>
> Sänt av: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> Datum: 05/18/2011 06:54
> Ärende: tdp for domino LAN free backup poor performance
>
> HI friends
>
> i am experiencing very very poor backup performance while taking backup of
> domino server.
> It is having around 700GB of data and LAN FREE backup on 2 tapes
> completing in 30 hours.
>
> OS WIN2k3 64_bit Ent Ed.
> Lotus. 8.5.2
> TDP for mail 5.5.3
> Storage agent 5.5
> Version of ibmtape device driver on the Domino windows host that controls
> tape drives---6.2.1.5
>
> i have also tried performance tunning parameters but no luck.
>
> DOMTXNGROUPMAX= 64
> DOMTXNBYTELIMIT =2097152
>
>
> dsm.opt
>
>
> *======================================================================*
>
> * *
>
> * IBM Tivoli Storage Manager for Mail *
>
> * Data Protection for Lotus Domino *
>
> * *
>
> * Sample Options File *
>
> * *
>
> *======================================================================*
>
> COMMMethod TCPip
>
> TCPPort 1500
>
> TCPServeraddress 10.3.3.34
>
> TCPWindowsize 63
>
> TCPBuffSize 32
>
> TXNBYTELIMIT 2097152
>
> 　
>
> NODename domino_PDCHM_tdp
>
> PASSWORDAccess Generate
>
> 　
>
> SCHEDMODE Polling
>
> *SCHEDLOGRetention 14
>
> *SCHEDMODE Prompted
>
> *TCPCLIENTADDRESS yy.yy.yy.yy
>
> *TCPCLIENTPORT 1502
>
> enablelanfree yes
>
> *lanfreecommmethod tcpip
>
> *lanfreetcpport 1500
>
> 　
>
> COMPRESSIon NO
>
> COMPRESSAlways NO
>
> 　
>
> 　
>
> * Exclude all databases named "db1.nsf" regardless of where they appear
>
> *EXCLUDE db1.nsf
>
> * Exclude all databases that match "help5_*" in the "help" subdirectory
>
> *EXCLUDE help\help5_*
>
> * Include all databases in the "mail6" directory
>
> *INCLUDE mail6\...\*
>
> * Assign all databases that match "*.nsf" in the "mail" subdirectory
>
> * to the "MAILDB" management class
>
> *INCLUDE mail\*.nsf* MAILDB
>
> * Exclude all databases in the "mail6" subdirectory from compression
>
> *EXCLUDE.COMPRESSION mail6\...\*
>
> * Encrypt all databases in the "mail5" directory
>
> *INCLUDE.ENCRYPT mail5\...\*
>
> * The Default include/exclude list follows:
>
> *
>
> * Note: You can back up the log.nsf database but you can only restore
>
> * it to an alternate name.
>
> *
>
> EXCLUDE log.nsf
>
> EXCLUDE mail.box
>
> * Include all transaction logs
>
> INCLUDE S*.TXN
>
> TCPNODELAY YES
>
>
> Regards
> Sandeep jain
>
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