[chandler-users] collection size after upgrade

[Rick Rawson]

Hi Jeffrey,

I don't know if this will be surprise to anyone at OSAF, but when I 
upgraded to 0.7.4, all of the data in my repository was destroyed 
(deleted), including backup repositories which I had saved in the 
C:\Program Files\Chandler 0.7.3 directory. Because I had no idea what 
was going to happen upon upgrading, I took the precaution of exporting 
AND backing up my data. Fortunately, I put my exported data in a 
location beyond the reach of the Chandler installer. The only way for me 
to recover after upgrading was to reload. It really wasn't a purposeful 
export/reload out of personal choice or "let's see what happens." It was 
the only way for me to recover my data.

I'll be interested in hearing your reaction to all this because I 
suspect that this wasn't supposed to happen. Reading between the lines, 
you might guess that my experience with upgrades (of ANY software) has 
often included negative consequences, for which I prepare.


Rick



Jeffrey Harris said the following on 2/14/2008 12:10 PM:
> Hi Rick,
> 
>> I obtain the item count when I "Export Collections and Settings..." The 
>> popup reports a number, which I took to be the number of items.
> 
> Hmm.  Somethings not right, then.  That number should be close to 
> constant on export and reload.
> 
>> Given what you wrote about this being expected behavior, it sounds like 
>> purging and Exporting/Reloading have different effects on the 
>> repository. If I have performance problems (Chandler slows down), would 
>> you recommend that I export, restart with a fresh repository, then reload?
> 
> Purge does much of what export/reload does, but not all.  It's not clear 
> to me that it's worth reloading in an attempt to improve performance, 
> because the reload process takes a while.  Part of what gradually slows 
> Chandler down is that different combinations of collections are indexed 
> (for viewing multiple collections overlaid).  The combinations are 
> created on the fly when you first view them.  Reloading drops those 
> indexes, so the next time you need them they'll have to be re-created.
> 
> Personally I don't bother exporting/reloading very often, but it's a 
> fine approach if it works for you!
> 
> Sincerely,
> Jeffrey
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