Paul wrote:
> Richard wrote:
>
> >Could you (or someone) please clarify the handling of the XM log files? Where
> >are they (system volume set or user volume set) for each volume set? I've
> >heard too many explanations that are contradictory. Thanks much!
>
> XM log files are on the master volume of each volume sets. There are 1 system
> log, 2 residual logs and 1 user log per volume set. System log protects
> system structures (ex. label table, directory, disk space allocation map)
> and its size is 13,032 kbytes. Residual logs support incremental recovery
> for system log and their size are 10,000 kbytes each. User log protects
> user files (ex. IMAGE/SQL, KSAM, user logging) and its size is 66,064 kbytes.
> Together they occupy roughly 96.25 megabytes per volume set.
...
I used <plug> De-Frag/X </plug> to show the sizes of the XM files (and other
reserved system files) on two different master volumes:
ldev 1, a 1.3GB disk, part of MPEXL_SYSTEM_VOLUME_SET
and
ldev 2, a 640MB disk, part of USERS volume set.
I marked the XM files with "->" in the left margin.
Ldev 1 has 4 XM files, totalling 96.6 MB.
Ldev 2 has 4 XM files, totalling 96.6 MB.
:run defragx.pub.lps
De-Frag/X B.01n (run on 3/07/96 13:43:13.4)
Copyright (c) 1993 Lund Performance Solutions
MPE/iX 5.0
# Boots since INSTALL : 53
Total # of mounted disks : 4
Size of largest currently mounted disk = 330,883 pages (1,292 MB).
De-Frag/X> de ldev 1 fragonly all
-------------------------------------------------
Ldev 1, entry# 1 --> $11.$600 = $LABEL_TABLE
% fragmented: 0.1 (# pages in file: 3,073 pages; 12.0 MBs)
-------------------------------------
Ldev 1, entry# 3 --> $11.$c00 = $xm system log
-> % fragmented: 0 (# pages in file: 3,258 pages; 12.7 MBs)
-------------------------------------
Ldev 1, entry# 4 --> $11.$f00 = $xm user log
-> % fragmented: 0 (# pages in file: 16,516 pages; 64.5 MBs)
-------------------------------------
Ldev 1, entry# 5 --> $11.$1200 = $SYSTEM_VSIT
% fragmented: 0.1 (# pages in file: 110 pages; 0.4 MBs)
-------------------------------------
Ldev 1, entry# 6 --> $11.$1500 = $RESERVE FILE
% fragmented: 0 (# pages in file: 1 pages)
-------------------------------------
Ldev 1, entry# 7 --> $11.$1800 = $ROOT
% fragmented: 40.0 (# pages in file: 6 pages)
-------------------------------------
Ldev 1, entry# 8 --> $11.$1b00 = $DEFECT_SLOUGH
(file has no disk space allocated)
-------------------------------------
Ldev 1, entry# 9 --> $11.$1e00 = $xm residual lg1
-> % fragmented: 0 (# pages in file: 2,500 pages; 9.7 MBs)
-------------------------------------
Ldev 1, entry# 10 --> $11.$2100 = $xm residual lg2
-> % fragmented: 0 (# pages in file: 2,500 pages; 9.7 MBs)
-------------------------------------
...
(control-Y)
De-Frag/X> redo
de ldev 1 fragonly all
2
de ldev 2 fragonly all
-------------------------------------------------
Ldev 2, entry# 1 --> $134.$600 = $LABEL_TABLE
% fragmented: 0.1 (# pages in file: 2,305 pages; 9.0 MBs)
-------------------------------------
Ldev 2, entry# 3 --> $134.$c00 = $xm system log
-> % fragmented: 0 (# pages in file: 3,258 pages; 12.7 MBs)
-------------------------------------
Ldev 2, entry# 4 --> $134.$f00 = $xm user log
-> % fragmented: 0 (# pages in file: 16,516 pages; 64.5 MBs)
-------------------------------------
Ldev 2, entry# 5 --> $134.$1200 = $SYSTEM_VSIT
% fragmented: 0.1 (# pages in file: 110 pages; 0.4 MBs)
-------------------------------------
Ldev 2, entry# 6 --> $134.$1500 = $RESERVE FILE
% fragmented: 0 (# pages in file: 1 pages)
-------------------------------------
Ldev 2, entry# 7 --> $134.$1800 = $ROOT
% fragmented: 40.0 (# pages in file: 6 pages)
-------------------------------------
Ldev 2, entry# 8 --> $134.$1b00 = $DEFECT_SLOUGH
(file has no disk space allocated)
-------------------------------------
Ldev 2, entry# 9 --> $134.$1e00 = $xm residual lg1
-> % fragmented: 0 (# pages in file: 2,500 pages; 9.7 MBs)
-------------------------------------
Ldev 2, entry# 10 --> $134.$2100 = $xm residual lg2
-> % fragmented: 0 (# pages in file: 2,500 pages; 9.7 MBs)
-------------------------------------
Ldev 2, entry# 21 --> $134.$4200 = $USER_NODE.SYS
% fragmented: 0 (# pages in file: 2 pages)
-------------------------------------
(control-Y)
--
Stan Sieler [log in to unmask]
http://www.allegro.com/sieler.html
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