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-----Original Message-----
From: Fernandes, Eustace [mailto:EFernandes AT talisman-energy DOT com]
Sent: December 30, 2005 3:49 PM
To: Paul Keating; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Inline tape copy slow
=09
=09
thanks for your reply.
30mb/sec that is double the speed I get for a normal backup to a
single tape
what version of Netbackup are you running?
what speed are you getting for a normal backup, non-ITC? is it
approx 30mb/sec?
=20
=09
I'm running NBU 5.4 MP4
Solaris 8 on a Sunfire V880 w/4 CPU and 8Gig RAM
dual FC HBAs and dual copper Gig E, but that should make no
difference.
I just have the drives zoned half to each HBA, and the NICs are
not trunked, so there's max 1Gig theorhetical throughput to any one job.
=20
I'm not sure what the throughput of the SDLT320 is, but 30MB/s
is the native write speed for the LTO2 drives....I can push the same
speed regardless of ITC or single tape.
=20
Did you tweak buffers or anything in /etc/system, etc.. to get
this to work?=20
=20
added the following in /etc/system:
set shmsys:shminfo_shmmax=3D335554432
set shmsys:shminfo_shmmin=3D1
set shmsys:shminfo_shmmni=3D100
set shmsys:shminfo_shmseg=3D10
set semsys:seminfo_semmnu=3D600
set semsys:seminfo_semmns=3D300
=20
My settings:
NET_BUFFER_SZ =3D 26214 -> 65563
NUMBER_DATA_BUFFERS =3D 32 -> 16=20
SIZE_DATA_BUFFERS =3D 65536 -> 262144
=20
don't know if these are related but I'll mention them just in
case ./db/config shm and ENABLE_SCSI_RESERVE=20
=20
Shouldn't matter..................=20
=20
I am consistently getting 8 mb/sec on ITC independent of what
pair of drives are used, but 16mb/sec for duplication and normal
backup(single tape)
Any ideas? .. could it be the LTO drives Vs SDLT320?=20
=20
If you can write 16MB/s to one drive, I don't know why you
couldn't write the same to 2 drives simultaneously, unless your media
server is underpowered, or you've got wierd SAN issues.
Nothing comes to mind.....in testing I did, way back, I had to
write to something like 4 or drives simultaneously before I saw any real
performance degradation.
=20
Paul
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<DIV><SPAN class=3D760160413-03012006></SPAN><SPAN =
class=3D760160413-03012006><FONT=20
face=3DArial color=3D#800000 size=3D2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #800000 2px =
solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft><FONT=20
face=3DTahoma size=3D2>-----Original Message-----<BR><B>From:</B> =
Fernandes,=20
Eustace [mailto:EFernandes AT talisman-energy DOT com] <BR><B>Sent:</B> =
December 30,=20
2005 3:49 PM<BR><B>To:</B> Paul Keating;=20
veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> RE: [Veritas-bu] =
Inline=20
tape copy slow<BR><BR></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>thanks for your reply.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>30mb/sec that is double the speed I get for a =
normal=20
backup to a single tape</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>what version of Netbackup are you=20
running?</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>what speed are you getting for a normal =
backup, non-ITC?=20
is it approx 30mb/sec?</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN><SPAN =
class=3D476431520-30122005><FONT=20
face=3DArial color=3D#0000ff size=3D2></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>
<DIV><SPAN class=3D760160413-03012006><FONT face=3DArial =
color=3D#800000 size=3D2>I'm=20
running NBU 5.4 MP4</FONT></SPAN></DIV>
<DIV><SPAN class=3D760160413-03012006><FONT face=3DArial =
color=3D#800000=20
size=3D2>Solaris 8 on a Sunfire V880 w/4 CPU and 8Gig =
RAM</FONT></SPAN></DIV>
<DIV><SPAN class=3D760160413-03012006><FONT face=3DArial =
color=3D#800000 size=3D2>dual=20
FC HBAs and dual copper Gig E, but that should make no=20
difference.</FONT></SPAN></DIV>
<DIV><SPAN class=3D760160413-03012006><FONT face=3DArial =
color=3D#800000 size=3D2>I=20
just have the drives zoned half to each HBA, and the NICs are not =
trunked, so=20
there's max 1Gig theorhetical throughput to any one=20
job.</FONT></SPAN></DIV>
<DIV><SPAN class=3D760160413-03012006><FONT face=3DArial =
color=3D#800000=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D760160413-03012006><FONT face=3DArial =
color=3D#800000 size=3D2>I'm=20
not sure what the throughput of the SDLT320 is, but 30MB/s is the =
native write=20
speed for the LTO2 drives....I can push the same speed regardless of =
ITC or=20
single tape.</FONT></SPAN></DIV></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2>Did you =
tweak buffers or=20
anything in /etc/system, etc.. to get this to work?<SPAN=20
class=3D760160413-03012006><FONT=20
color=3D#800000> </FONT></SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT size=3D2><SPAN=20
=
class=3D760160413-03012006></SPAN></FONT></FONT></FONT></SPAN> </DIV=
>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT color=3D#800000 size=3D2><SPAN =
class=3D760160413-03012006>added the=20
following in /etc/system:</SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2><SPAN=20
class=3D760160413-03012006><FONT color=3D#800000>set=20
shmsys:shminfo_shmmax=3D335554432<BR>set =
shmsys:shminfo_shmmin=3D1<BR>set=20
shmsys:shminfo_shmmni=3D100<BR>set shmsys:shminfo_shmseg=3D10<BR>set=20
semsys:seminfo_semmnu=3D600<BR>set=20
=
semsys:seminfo_semmns=3D300</FONT><BR></SPAN></FONT></FONT></FONT></SPAN>=
<SPAN=20
class=3D476431520-30122005><FONT color=3D#0000ff><FONT =
face=3DArial><FONT=20
size=3D2><SPAN=20
=
class=3D760160413-03012006> </SPAN></FONT></FONT></FONT></SPAN></DIV=
>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT color=3D#800000 =
size=3D2><SPAN=20
class=3D760160413-03012006>My =
settings:</SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2>NET_BUFFER_SZ =
=3D 26214<SPAN=20
class=3D760160413-03012006><FONT=20
color=3D#800000> ->=20
65563</FONT></SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2>NUMBER_DATA_BUFFERS =
=3D 32<SPAN=20
class=3D760160413-03012006><FONT color=3D#800000> ->=20
16 </FONT></SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2>SIZE_DATA_BUFFERS =
=3D 65536<SPAN=20
class=3D760160413-03012006><FONT=20
color=3D#800000> ->=20
262144</FONT></SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT color=3D#800000 =
size=3D2><SPAN=20
=
class=3D760160413-03012006></SPAN></FONT></FONT></FONT></SPAN> </DIV=
>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2>don't know if these =
are related=20
but I'll mention them just in case ./db/config shm and=20
ENABLE_SCSI_RESERVE<SPAN class=3D760160413-03012006><FONT=20
color=3D#800000> </FONT></SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2><SPAN=20
=
class=3D760160413-03012006></SPAN></FONT></FONT></FONT></SPAN> </DIV=
>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2><SPAN=20
class=3D760160413-03012006><FONT color=3D#800000>Shouldn't=20
=
matter..................</FONT> </SPAN></FONT></FONT></FONT></SPAN><=
/DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>I am consistently getting 8 mb/sec on ITC =
independent of=20
what pair of drives are used, but 16mb/sec for duplication and normal=20
backup(single tape)</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D476431520-30122005><FONT=20
color=3D#0000ff><FONT face=3DArial><FONT size=3D2>Any ideas? .. could =
it be the LTO=20
drives Vs SDLT320?<SPAN class=3D760160413-03012006><FONT=20
color=3D#800000> </FONT></SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT size=3D2><SPAN=20
=
class=3D760160413-03012006></SPAN></FONT></FONT></FONT></SPAN> </DIV=
>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT color=3D#800000 size=3D2><SPAN =
class=3D760160413-03012006>If you=20
can write 16MB/s to one drive, I don't know why you couldn't write the =
same to=20
2 drives simultaneously, unless your media server is underpowered, or =
you've=20
got wierd SAN issues.</SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT color=3D#800000 size=3D2><SPAN =
class=3D760160413-03012006>Nothing=20
comes to mind.....in testing I did, way back, I had to write to =
something like=20
4 or drives simultaneously before I saw any real performance=20
degradation.</SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT color=3D#800000 size=3D2><SPAN=20
=
class=3D760160413-03012006></SPAN></FONT></FONT></FONT></SPAN> </DIV=
>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D476431520-30122005><FONT><FONT=20
face=3DArial><FONT color=3D#800000 size=3D2><SPAN=20
=
class=3D760160413-03012006>Paul</SPAN></FONT></FONT></FONT></SPAN></DIV><=
/BLOCKQUOTE></BODY></HTML>
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