ONTAPE備份問題

hk7903

請問我用ontape -s -L 0 備份時，速度非常慢，備份1.5G要用將近4個小時，我記得之前隻要半個小時就完成了，不知問題出在哪裡？我的onconfig 裡磁帶機的參數如下：

我是直接備份到硬盤的

TAPEDEV         /data/Backup/bk0 # Tape device path
#TAPEDEV         /dev/null       # Tape device path
TAPEBLK         64              # Tape block size (Kbytes)
TAPESIZE        1572864         # Maximum amount of data to put on tape (Kbytes)

wenlq

什么版本？
onstat -D 看是不是有很多写操作？
若是的话 是碰到 bug 了。

wenlq

To my knowledge 7.30 is not supported anymore and I strongly suggest you
cantact IBM to get an upgrade version . (7.31, 9.4 or even 10.00)

Apart from that from your description it appears you are hit Informix
defect

101062.
ARCHIVE PERFORMANCE DEGRADATION WHEN MANY CALLS TO
ARC_VERY_OLD_PAGE()

The defect causes archives to run very slow , in case many updates have
happend
between two L-0 archives.

This defect is fixed in IDS 7.31.UD1  and higher and in 9.4 and 10.00.

With kind regards
Tilman Model-Bosch

--
Tilman Model-Bosch
IBM Data Management Solutions, Informix Advanced Support
c\o SAP AG
TECHDEV 05
Neurrotstr.16
69190 Walldorf