Re: CISAM

In article <7lbd8j$b47$1@news.xmission.com>, Mark <mark@conxsys.on.ca> wrote: >I was planning to use the C-ISAM 7.24.UC5 for Linux library with SE >7.24.UC5 created files >and noticed that in the release note for the C-ISAM that the ISAM files >are not >compatible. Has anyone tried this on Linux or any other UNIX that the >C-ISAM package is available for? DON'T try it. The warning is there because C-ISAM uses a different locking method than SE did, so you won't get proper concurrency control between the two. That will be the case until/unless SE is re-released with the same locking method. -- Alan Denney yosemite at accesscom.com Not a spokesman for Yosemite Botanical Munitions Inc. or Access Compost Supply.

It works fine on HP-UX 10.20 - cisam and SE data/index are fully compatible. As for being incompatible under the aspect of different number of indices (as posted in this thread) - the number of indexes added has to be done explicitly under cisam so in order to be compatible, one has to add the extra index which is added as default by SQL. I tried finding the reference given about incompatibilty in any documentation files available with the product but could not find anything. If you could please post the source of this statement. If the locking mechanisms would be different, why is the byte in the index file defining the locking mechanism the same in both index files (Cisam, SE)? Also, both versions (Cisam, SE) are same: 7.24.UC5 on the same hardware platform. One would expect it to be compatible leaving the fact why it is not open to speculation. Sam In article <7lckcu$otj$1@shell.accesscom.com>, yosemite@accesscom.removethis.com wrote: > In article <7lbd8j$b47$1@news.xmission.com>, Mark <mark@conxsys.on.ca> wrote: > >I was planning to use the C-ISAM 7.24.UC5 for Linux library with SE > >7.24.UC5 created files > >and noticed that in the release note for the C-ISAM that the ISAM files > >are not > >compatible. Has anyone tried this on Linux or any other UNIX that the > >C-ISAM package is available for? > > DON'T try it. The warning is there because C-ISAM uses a different > locking method than SE did, so you won't get proper concurrency > control between the two. That will be the case until/unless SE is > re-released with the same locking method. > > -- > Alan Denney yosemite at accesscom.com > > Not a spokesman for Yosemite Botanical Munitions Inc. or Access Compost Supply. > > Sent via Deja.com http://www.deja.com/ Share what you know. Learn what you don't.