Re: What happens when persistent outrigger gets full

Gary Kendall wrote:

>Hi,
>
>
>
>I've been running some performance/scalability tests using persistent
>outrigger.
>
>
>
>As expected, I've managed to exceed the 2GB limit of PSE Pro for the
>persistent space. However, to my surprise, the space has carried on working.
>The only problem is that I now have many LogStore entries that are no longer
>getting consolidated into the PSE file.
>
>
>
>I just wondered if this configuration is supposed to carry on working,
>albeit impacting performance, or whether I should mistrust anything that
>comes out of outrigger in this state.
>
>
>
>Does anyone care to share their experience on this matter?
>
>
A couple of things. First, we are not aware of a 2GB limitation for
PSEPro. It does keep
all of the objects in one file, so you could be running into a
filesystem level 2GB limit
(of course in practice the fact that Outrigger caches everything in
memory make running
out of memory a much more likely problem).

Second, Outrigger is not very good when it runs into limits, so in
general I would tend
to mistrust an Outrigger which has been pushed too far.

Third, one of the items that we wanted to do for Porter, but that got
pushed off because
of JavaSpace05 was having Outrigger keep track of how many bytes were
being used
to store entries and allowing deployers to configure a hard limit where
it would stop
accepting writes (thinking more about it I could also see having a soft
limit where
Outrigger would throttle writes down).  Don't know it this will make the
Harvard list
or not, but if you feel such a feature is important feel free to ask
(actually in general
this would be a good time for people talk about what they would like to
see in Outrigger
- I can't guarantee we will do it, but it having people ask for features
makes it more
likely that we will do them).

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