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IDS Forum

Lost chunk/dbspace space

Posted By: Kennedy, Randy
Date: Monday, 29 November 2010, at 2:27 p.m.

Anybody have any ideas on this?

Thanks,
Randy

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
Kennedy, Randy
Sent: Tuesday, November 23, 2010 10:44 AM
To: ids@iiug.org
Subject: Lost chunk/dbspace space [22024]

We have moved from an HP/UX 9.4FC3, physical server/drive environment to

a RHEL 5, 11.1FC3 (no option to go to 11.5 or 11.7) VM server/SAN
storage environment.

In HP/UX, I used SAM to create logical volumes of raw disk space and
then used symbolic links to create the chunks for Informix. I tried to
mirror that setup for the new server and believe I have done so, but
when I try to create my spaces/chunks, I cannot create them anywhere
near the size that I created the 'space' as. For example, I created a
2048MB piece of space (partition 11 below), linked a raw device to it,
created my symbolic link to the raw device, but when I try and create a
dbspace in it, the largest size that it allows in 1952MB (anything
larger returns an error of "the chunk <symbolic linked file name> will
not fit in the space specified")

Any clue as to where the extra space is going or if I am creating them
wrong? I used parted to partition out the large VM hard drive (made up
of SAN space) that the server is aware of.

Here is the parted view of the drive. I created partition 4 as the
container for all the DB storage, then subdivided that into partitions
5-13. 1-3 are used for server OS and filesystem needs.

GNU Parted 1.8.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p

Model: VMware Virtual disk (scsi)
Disk /dev/sda: 69.8GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 9434MB 9434MB primary ext3 boot
2 9434MB 14.7GB 5240MB primary ext3
3 14.7GB 16.8GB 2097MB primary linux-swap
4 16.8GB 62.9GB 46.1GB extended lba
5 16.8GB 20.9GB 4096MB logical
6 20.9GB 21.9GB 1028MB logical
7 21.9GB 25.0GB 3072MB logical
8 25.0GB 25.5GB 500MB logical
9 25.5GB 25.6GB 100MB logical
13 25.6GB 25.9GB 350MB logical
10 25.9GB 26.2GB 250MB logical
11 26.2GB 28.2GB 2048MB logical
12 28.2GB 53.8GB 25.6GB logical

Doing this gave me /dev/sda4-13 block devices

brw-r----- 1 root disk 8, 0 Nov 23 09:39 sda
brw-rw---- 1 informix informix 8, 1 Nov 23 09:39 sda1
brw-rw---- 1 informix informix 8, 10 Nov 23 09:39 sda10
brw-rw---- 1 informix informix 8, 11 Nov 23 10:09 sda11
brw-rw---- 1 informix informix 8, 12 Nov 23 09:39 sda12
brw-rw---- 1 informix informix 8, 13 Nov 23 09:39 sda13
brw-r----- 1 root disk 8, 2 Nov 23 09:39 sda2
brw-r----- 1 root disk 8, 3 Nov 23 09:39 sda3
brw-r----- 1 informix informix 8, 4 Nov 23 09:39 sda4
brw-r----- 1 informix informix 8, 5 Nov 23 09:39 sda5
brw-r----- 1 informix informix 8, 6 Nov 23 09:39 sda6
brw-r----- 1 informix informix 8, 7 Nov 23 09:39 sda7
brw-r----- 1 informix informix 8, 8 Nov 23 09:39 sda8
brw-r----- 1 informix informix 8, 9 Nov 23 09:39 sda9

I then used raw to create the character devices.

/dev/raw/raw1: bound to major 8, minor 5
/dev/raw/raw2: bound to major 8, minor 6
/dev/raw/raw3: bound to major 8, minor 7
/dev/raw/raw4: bound to major 8, minor 8
/dev/raw/raw5: bound to major 8, minor 13
/dev/raw/raw6: bound to major 8, minor 10
/dev/raw/raw7: bound to major 8, minor 11
/dev/raw/raw8: bound to major 8, minor 12

I then used the characters devices for my symbolic links

lrwxrwxrwx 1 informix informix 13 Nov 17 14:34 casedatadbs ->
/dev/raw/raw8
lrwxrwxrwx 1 informix informix 13 Nov 17 14:32 commondbs ->
/dev/raw/raw6
lrwxrwxrwx 1 informix informix 13 Nov 16 12:22 dwdbs -> /dev/raw/raw3
lrwxrwxrwx 1 informix informix 13 Nov 16 12:22 llogsdbs ->
/dev/raw/raw4
lrwxrwxrwx 1 informix informix 13 Nov 17 14:30 rootdbs ->
/dev/raw/raw5
lrwxrwxrwx 1 informix informix 13 Nov 11 14:29 tempdbs ->
/dev/raw/raw1
lrwxrwxrwx 1 informix informix 13 Nov 16 12:21 testdbs ->
/dev/raw/raw2
lrwxrwxrwx 1 informix informix 10 Nov 23 10:05 working2dbs ->
/dev/sda11
lrwxrwxrwx 1 informix informix 13 Nov 17 14:33 workingdbs ->
/dev/raw/raw7

I then used the symbolic link file path for the dbspace creation.

=>onspaces -c -d workingdbs -p /db/links/workingdbs -o 0 -s 2097152
Verifying physical disk space, please wait ...
The chunk '/db/links/workingdbs' will not fit in the space specified.

TIA,
Randy

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