Summary Re: [Veritas-bu] bptm log: buffer settings

After I set both tcp_recv_hiwat and tcp_xmit_hiwat to 65536 on all the
clients, the log looks better:

...
00:08:52.257 [19767] <2> io_set_recvbuf: setting receive network buffer to 
262144 bytes
00:08:52.257 [19767] <2> io_set_recvbuf: receive network buffer is 263536 bytes
...


Rongsheng

On Sun, Jul 18, 2004 at 09:18:37PM -0400, Rongsheng Fang wrote:
> From: Rongsheng Fang <rfang AT coke.umuc DOT edu>
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Message-ID: <20040719011837.GA1271 AT coke.umuc DOT edu>
> Mail-Followup-To: veritas-bu AT mailman.eng.auburn DOT edu
> User-Agent: Mutt/1.4.1i
> Subject: [Veritas-bu] bptm log: buffer settings
> Date: Sun, 18 Jul 2004 21:18:37 -0400
> 
> Hi,
> 
> We are running a Sun StorEdge L700 tape library which is connected to a
> Sun Fire V880 (master+media server) directly via fibre. There are 6 IBM
> Ultrium (Gen 2) tape drives installed in the L700. Solaris 9 is running
> on V880 along with Netbackup DataCenter 4.5MP6. I have set the following
> settings based on the performance guide:
> 
> On Master/Media: 
> 
> NET_BUFFER_SZ: 256K
> SIZE_DATA_BUFFERS: 256K
> NUMBER_DATA_BUFFERS: 256
> 
> tcp_recv_hiwat: 256K
> tcp_xmit_hiwat: 256K
> 
> On clients:
> 
> NET_BUFFER_SZ: 256K
> 
> 
> But from the bptm log below, it looks like the network buffer was still
> set to 64240 bytes, not 256k:
> 
> ...
> 18:08:49.727 [9884] <2> io_set_recvbuf: setting receive network buffer to 
> 262144 bytes
> 18:08:49.727 [9884] <2> io_set_recvbuf: receive network buffer is 64240 bytes
> 18:08:50.417 [9713] <2> tapelib: SIGUSR1 from bpbrm while waiting for tape 
> mount
> ...
> 18:08:50.418 [9713] <2> io_init: using 262144 data buffer size
> 18:08:50.418 [9713] <2> io_init: CINDEX 6, sched Kbytes for monitoring = 20000
> 18:08:50.418 [9713] <2> io_init: using 256 data buffers
> 18:08:50.418 [9713] <2> io_init: child delay = 20, parent delay = 30 
> (milliseconds)
> 18:08:50.419 [9713] <2> getsockconnected: host=backupsrv service=bpdbm
> address=10.15.0.51 protocol=tcp non-reserved port=13 721
> 18:08:50.419 [9713] <2> bind_on_port_addr: bound to port 59831
> 18:08:50.420 [9713] <2> logconnections: BPDBM CONNECT FROM 10.15.0.20.59831 
> TO 10.15.0.20.13721
> 18:08:50.422 [9713] <2> check_authentication: no authentication required
> 18:08:50.491 [9713] <2> mpx_setup_shm: buf control for CINDEX 6 is 0xfed89018
> ...
> 
> Did I miss anything in configuration (both Solaris kernel side and NB
> side)? Or there is a OS limit on the size of the receive network buffer?
> What needs to be done to ensure NetBackup can set and use 256K receive
> network buffer?
> 
> Thanks for your help,
> 
> Rongsheng
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