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| Title: | DIGITAL UNIX (FORMERLY KNOWN AS DEC OSF/1) |
| Notice: | Welcome to the Digital UNIX Conference |
| Moderator: | SMURF::DENHAM |
|
| Created: | Thu Mar 16 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 10068 |
| Total number of notes: | 35879 |
10056.0. "LSM striping/HSZ50/DU3.2G problem?" by NESBIT::BGIRVAN () Thu Jun 05 1997 16:34
[Cross-posted in LSM conference]
Has anyone come across the following situation ?
System: 8400 with 6 440Mhz CPU's, 6 GB memory, KFTHA, 2
DWLPB's,
6 KZPSA-BB, 4 dual HSZ50's with 128 MB cache and 24
RZ29B-VA's as 4 RAID 0+1 disks, TZ87 loader.
OS DU 3.2G with full DUV32GAS00001-19970501 patches
applied +
latest simport.o patch.
Application SYBASE 10 and 11
We have created striped volumes across the PCI buses. Most are used
as
raw devices for Sybase but a few are used as a dump area to bring
in
the Sybase dumps from tape before importing them into the database.
The
dumps directories have had both ADVFS and UFS applied with the same
result. And that result is that performing a checksum on the dump
file
gives a different answer than was origionaly obtained. Running a
checksum a few seconds later gives yet a different answer every
time.
We then tested this by restoring the dump file to a UFS created
directly on an HSZ50 disk and on an un-striped LSM volume and the
checksum was as it should be.
We are also getting a lot of Sybase 605 errors when running the
benchmark batch tests, suggesting that the database has been
corrupted.
Is the LSM striping the cause of the above problems?
I have used LSM striping in many previous benchmarks, but I have
never
seen this behaviour.
The LSM layout is as follows:(I've left out all the subdisks)
volboot:
volboot 3.1 0.5
hostid bench4
disk rz3 sliced
disk rz26 sliced
disk rz27 sliced
disk rz2 sliced
end
###############################################################
###############################################################
###############################################################
###############################################################
###############################################################
###############################################################
#######################
volprint -S rootdg
VOLUMES PLEXES SUBDISKS PLEXFREE SDFREE DISKS
68 68 133 0 0 6
voldg list Details rootdg
Group: rootdg
dgid: 864375462.1025.bench4
import-id: 0.1
flags:
config: seqno=0.2122 permlen=173 free=31 templen=88 loglen=26
config disk rz3 copy 1 len=173 state=clean online
config disk rz3 copy 2 len=173 state=clean online
config disk rz26 copy 1 len=173 state=clean online
config disk rz26 copy 2 len=173 state=clean online
config disk rz27 copy 1 len=347 state=clean online
config disk rz2 copy 1 len=347 state=clean online
config disk rz25 copy 1 len=347 state=clean online
config disk rz10 copy 1 len=347 state=clean online
log disk rz3 copy 1 len=26
log disk rz3 copy 2 len=26
log disk rz26 copy 1 len=26
log disk rz26 copy 2 len=26
log disk rz27 copy 1 len=52
log disk rz2 copy 1 len=52
log disk rz25 copy 1 len=52
log disk rz10 copy 1 len=52
voldg list Details rootdg
Group: rootdg
dgid: 864375462.1025.bench4
import-id: 0.1
flags:
config: seqno=0.2122 permlen=173 free=31 templen=88 loglen=26
config disk rz3 copy 1 len=173 state=clean online
config disk rz3 copy 2 len=173 state=clean online
config disk rz26 copy 1 len=173 state=clean online
config disk rz26 copy 2 len=173 state=clean online
config disk rz27 copy 1 len=347 state=clean online
config disk rz2 copy 1 len=347 state=clean online
config disk rz25 copy 1 len=347 state=clean online
config disk rz10 copy 1 len=347 state=clean online
log disk rz3 copy 1 len=26
log disk rz3 copy 2 len=26
log disk rz26 copy 1 len=26
log disk rz26 copy 2 len=26
log disk rz27 copy 1 len=52
log disk rz2 copy 1 len=52
log disk rz25 copy 1 len=52
log disk rz10 copy 1 len=52
voldisk list Details
DEVICE TYPE DISK GROUP STATUS
rz10 sliced rz10 rootdg online
rz2 sliced rz2 rootdg online
rz25 sliced rz25 rootdg online
rz26 sliced rz26 rootdg online
rz27 sliced rz27 rootdg online
rz3 sliced rz3 rootdg online
voldisk list rz10
(rz10 disklabel)
Device: rz10
devicetag: rz10
type: sliced
hostid: bench4
disk: name=rz10 id=864375581.1073.bench4
group: name=rootdg id=864375462.1025.bench4
flags: online ready private imported
pubpaths: block=/dev/rz10h char=/dev/rrz10h
privpaths: block=/dev/rz10g char=/dev/rrz10g
version: 1.1
iosize: 512
public: slice=7 offset=0 len=1855472
private: slice=6 offset=0 len=512
update: time=865500611 seqno=0.27
headers: 0 248
configs: count=1 len=347
logs: count=1 len=52
Defined regions:
config priv 17- 247[ 231]: copy=01 offset=000000
config priv 249- 364[ 116]: copy=01 offset=000231
log priv 365- 416[ 52]: copy=01 offset=000000
voldisk list rz2
(rz2 disklabel)
Device: rz2
devicetag: rz2
type: sliced
hostid: bench4
disk: name=rz2 id=864375514.1057.bench4
group: name=rootdg id=864375462.1025.bench4
flags: online ready private imported
pubpaths: block=/dev/rz2h char=/dev/rrz2h
privpaths: block=/dev/rz2g char=/dev/rrz2g
version: 1.1
iosize: 512
public: slice=7 offset=0 len=25133556
private: slice=6 offset=0 len=512
update: time=865500611 seqno=0.39
headers: 0 248
configs: count=1 len=347
logs: count=1 len=52
Defined regions:
config priv 17- 247[ 231]: copy=01 offset=000000
config priv 249- 364[ 116]: copy=01 offset=000231
log priv 365- 416[ 52]: copy=01 offset=000000
voldisk list rz25
(rz25 disklabel)
Device: rz25
devicetag: rz25
type: sliced
hostid: bench4
disk: name=rz25 id=864375563.1066.bench4
group: name=rootdg id=864375462.1025.bench4
flags: online ready private imported
pubpaths: block=/dev/rz25h char=/dev/rrz25h
privpaths: block=/dev/rz25g char=/dev/rrz25g
version: 1.1
iosize: 512
public: slice=7 offset=0 len=12327882
private: slice=6 offset=0 len=512
update: time=865500611 seqno=0.27
headers: 0 248
configs: count=1 len=347
logs: count=1 len=52
Defined regions:
config priv 17- 247[ 231]: copy=01 offset=000000
config priv 249- 364[ 116]: copy=01 offset=000231
log priv 365- 416[ 52]: copy=01 offset=000000
voldisk list rz26
(rz26 disklabel)
Device: rz26
devicetag: rz26
type: sliced
hostid: bench4
disk: name=rz26 id=864375463.1035.bench4
group: name=rootdg id=864375462.1025.bench4
flags: online ready private imported
pubpaths: block=/dev/rz26h char=/dev/rrz26h
privpaths: block=/dev/rz26g char=/dev/rrz26g
version: 1.1
iosize: 512
public: slice=7 offset=0 len=25133556
private: slice=6 offset=0 len=512
update: time=865500610 seqno=0.42
headers: 0 248
configs: count=2 len=173
logs: count=2 len=26
Defined regions:
config priv 17- 189[ 173]: copy=01 offset=000000
log priv 190- 215[ 26]: copy=01 offset=000000
log priv 296- 321[ 26]: copy=02 offset=000000
config priv 322- 494[ 173]: copy=02 offset=000000
voldisk list rz27
(rz27 disklabel)
Device: rz27
devicetag: rz27
type: sliced
hostid: bench4
disk: name=rz27 id=864375464.1042.bench4
group: name=rootdg id=864375462.1025.bench4
flags: online ready private imported
pubpaths: block=/dev/rz27h char=/dev/rrz27h
privpaths: block=/dev/rz27g char=/dev/rrz27g
version: 1.1
iosize: 512
public: slice=7 offset=0 len=25133556
private: slice=6 offset=0 len=512
update: time=865500610 seqno=0.42
headers: 0 248
configs: count=1 len=347
logs: count=1 len=52
Defined regions:
config priv 17- 247[ 231]: copy=01 offset=000000
config priv 249- 364[ 116]: copy=01 offset=000231
log priv 365- 416[ 52]: copy=01 offset=000000
voldisk list rz3
(rz3 disklabel)
Device: rz3
devicetag: rz3
type: sliced
hostid: bench4
disk: name=rz3 id=864375462.1028.bench4
group: name=rootdg id=864375462.1025.bench4
flags: online ready private imported
pubpaths: block=/dev/rz3h char=/dev/rrz3h
privpaths: block=/dev/rz3g char=/dev/rrz3g
version: 1.1
iosize: 512
public: slice=7 offset=0 len=25133556
private: slice=6 offset=0 len=512
update: time=865500610 seqno=0.42
headers: 0 248
configs: count=2 len=173
logs: count=2 len=26
Defined regions:
config priv 17- 189[ 173]: copy=01 offset=000000
log priv 190- 215[ 26]: copy=01 offset=000000
log priv 296- 321[ 26]: copy=02 offset=000000
config priv 322- 494[ 173]: copy=02 offset=000000
Billy
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 10056.1 | | KITCHE::schott | Eric R. Schott USG Product Management | Thu Jun 05 1997 21:54 | 9 |
| Do you have new-wire-method set to off?
have you run sys_check on the system?
http://www-unix.zk3.dec.com/tuning/tools/sys_check.html
or note 7178
|
| 10056.2 | It's easy when you know how | NESBIT::BGIRVAN | | Fri Jun 06 1997 04:51 | 14 |
| The problem lay in the banks scripts which created all the volumes as
LSM 'gen' devices. What they did then was simply to layer a file system
on the LSM block device and mount this. They claim they do this back at
base. They did in fact show that this seemed to work when a simple
volume was used, but not with a striped volume. Changing to 'fsgen' was
all that was required.
Billy
BTW Eric, new-wire-method = 0, and I have run sys_check on the system.
It's a very usefull utility.
|