Hi
The use of ram cache has problems
Framework memory garbage collector (gc) will consider memory allocated
for certain amount of time as allocated for the rest of application life.
Either mono or windows, both their own way and different criteria.
So if when our memory cache expires a asset, its memory may never be
released staying there dead, impossible to use until the simulator (or robust)
shuts down.
We already have this issue with objects with shorter use time than such
assets cache would have.
Ubit
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of David Saunders
Sent: Thursday, February 01, 2018 17:57
To: [email protected]
Subject: Re: [Opensim-users] What is the best way to manage asset cache on an
OSgrid set of regions
Hey,
This what I have found out.
The cache will grow.
You can delete it at any time, it will be rebuilt. So each of our servers
deletes the cache files from time to time.
cache file reduced the load on the asset server, this is very important When
the asset server is in a different location on the internet.
Cache is good when you allot of shared assets between simulators., it allows
local files to be used when you get cache hits.
We run 20 of single region simulators on several servers It does help with the
load on the asset server and the database chop.
We do use the floatsome cache, thought about a RAM cache a few times but I
studied it some and thing the size of some or regions would make it unpractical
to implement.
David
On Sat, Jan 6, 2018 at 3:29 PM, AJLDuarte <[email protected]> wrote:
> Hi,
> A) yes it is good idea to share assets cache
> B and C)
> Cache will grow for ever taking 2 much disk space possible
> with useless entries.
> Using one instance to do expires is a option, it will even try
> to not delete assets in use, but just on that instance, so not that
> useful in this case, just waste of cpu.
> Using a external tool (both windows cmd and bash have usable
> commands) to delete files modified long ago is another option.
> Wrong deletes should not be a major issue, assuming all assets
> are on grid databases, if not you are in trouble anyways :) Regards,
> Ubit
>
> -----Original Message-----
> From: [email protected] [mailto:
> [email protected]] On Behalf Of
> [email protected]
> Sent: Saturday, January 06, 2018 04:08
> To: OS-Opensim Users
> Subject: [Opensim-users] What is the best way to manage asset cache on
> an OSgrid set of regions
>
> I run three servers each have a few instances of opensim running on
> them and all of the regions are on OSgrid.
>
> I have a common asset cache for each servers, that all the instances
> use. Maybe that is not a good idea, but I thought it might help keep
> it’s size smaller than every instance having it’s own asset cache.
>
> Up to now I have not expired any items in the cache. Yes, they are
> massive in size.
>
> I have been thinking about having one instance expire the cache and
> using a retention time of 48 hours.
>
> Is that a good or bad idea?
>
> I do have a fair amount of activity on each server as I run free home
> sites for many OSgrid users.
>
> I am wondering a few things:
>
> - Is running a single cache for several instances of opensim a good or
> bad idea?
> - Is not expiring the cache a good or bad idea?
> - Can one instance do the expiring of the cache for all instances
> since they all share the same cache?
>
> Tom
>
>
>
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