McCammont, Anderson (IT) wrote:

>scsi or fibre attached?  any errors on the connections - 5MB/s is lousy
>- where's your data coming from?  If a remote client check for speed and
>duplex mismatches.
>what do you get from doing a 'dd bs=256k' of local data direct to the
>tape drive - ie take netbackup out of the picture.
>When that's at a sensible spped, backup the local files with netbackup
>and ensure you get similar throughput.
>Then look at a network backup.
>
>how much memoryon the master?  assuming you have plenty, say >2GB, for
>lto2 use
>NUMBER_DATA_BUFFERS    64 
>SIZE_DATA_BUFFERS              262144
>NET_BUFFER_SZ          262144
>
>have these in /etc/system, change the ge for the equiv for your NICs
>* netbackup  shared mem, sem and msg params
>set msgsys:msginfo_msgmap=65536
>set msgsys:msginfo_msgmni=65536
>set msgsys:msginfo_msgtql=65536
>set msgsys:msginfo_msgmnb=16384000
>set msgsys:msginfo_msgseg=32767
>set msgsys:msginfo_msgssz=2048
>set semsys:seminfo_semmsl=1024
>* see infodoc ID71160
>* monitor with 
>* kstat -c net | egrep 'nocanput|blocked'
>* kstat -n ge0 -s rx_overflow
>* and 20040615
>set sq_max_size=0x64
>* gigE flow control
>set ge:ge_adv_pauseTX=1
>* bpjobd swallows file descriptors
>set rlim_fd_max=65535
>set rlim_fd_cur=2048
>
>set your network switches to send and receive pause frames if using
>gigE.
>
>
>  
>
>>-----Original Message-----
>>From: veritas-bu-admin AT mailman.eng.auburn DOT edu 
>>[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of 
>>Dave Markham
>>Sent: 26 October 2005 12:43
>>To: veritas-bu AT mailman.eng.auburn DOT edu
>>Subject: [Veritas-bu] system settings and tuning
>>
>>I have used the settings described here previously:-
>>
>>http://seer.support.veritas.com/docs/183702.htm
>>
>>And solaris tuning settings in /etc/system from a performance tuning 
>>guide but they all seem to be a bit dated and i was wondering 
>>had anyone 
>>any more up to date info for performance increasing?
>>
>>I have just set up a Solaris 9 netbackup 5.0MP5 with an L25 
>>and two LTO2 
>>drives.  Im only getting 5meg/sec on a backup test but have 
>>done no tuning.
>>
>>With servers getting better ( this is a v240 ) i was wondering were 
>>there hight /etc/system settings and other tuning parameters for NBU
>>
>>Any help would be great
>>
>>Cheers
>>_______________________________________________
>>Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
>>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>>
>>    
>>
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Thanks for that.

Im scsi attached directly at the moment from netbackup master/media to 
the L25 and getting 5mb/s.

I will go and change the NUMBER_DATA_BUFFERS to 64 from 16 i had 
previously.

There is enough mem im sure and i worked out shmmax to be 83886080 with 
2 drives , mpx of 10 and 262144 SIZE_DATA_BUFF and 16 DATA BUFFERS. 
After all this speed went to 15mb/s.

Im hoping to squeeze more out of it as they are LTO2.

Cheers