r Shutyaev wrote:
> Hi Derek,
>
> I'm using size-tiered compaction.
>
> 2012/9/3 Derek Williams
> On Fri, Aug 31, 2012 at 7:03 AM, Alexander Shutyaev
> wrote:
> Does anyone have any suggestions on how can I analyze my problem? Or maybe
> I'm doing something w
Hi Derek,
I'm using size-tiered compaction.
2012/9/3 Derek Williams
> On Fri, Aug 31, 2012 at 7:03 AM, Alexander Shutyaev wrote:
>
>> Does anyone have any suggestions on how can I analyze my problem? Or
>> maybe I'm doing something wrong and there is another way t
On Fri, Aug 31, 2012 at 7:03 AM, Alexander Shutyaev wrote:
> Does anyone have any suggestions on how can I analyze my problem? Or maybe
> I'm doing something wrong and there is another way to force gc on an
> existing column family.
>
Are you using leveled compaction? I haven
> Maybe there is some tool to analyze it? It would be great if I could somehow
> export each row of a column family into a separate file - so I could see
> their count and sizes. Is there any such tool? Or maybe you have some better
> thoughts...
Use something like pycassa to non-obnoxiously itera
Hi Peter,
I don't compare it with PosgreSQL size, I just make some estimations.. This
table / column family stores some xml documents with average raw size of
2Mb each and total size about 5Gb. However the space cassandra occupies on
disc is 70Gb (after gc_grace was set to 0 and major compaction w
> I think that was clear from your post. I don't see a problem with your
> process. Setting gc grace to 0 and forcing compaction should indeed
> return you to the smallest possible on-disk size.
(But may be unsafe as documented; can cause deleted data to pop back up, etc.)
--
/ Peter Schuller (@
> I think I described the problem wrong :) I don't want to do Java's memory
> GC. I want to do cassandra's GC - that is I want to "really" remove deleted
> rows from a column family and get my disc space back.
I think that was clear from your post. I don't see a problem with your
process. Setting
erwrites and deletes. If I understand correctly cassandra does not
>> actually delete these objects until gc_grace seconds have passed. I tried
>> to "force" gc by setting gc_grace to 0 on an existing column family and
>> running major compaction afterwards. However I did n
e these objects until gc_grace seconds have passed. I tried
> to "force" gc by setting gc_grace to 0 on an existing column family and
> running major compaction afterwards. However I did not get disk space back,
> although I'm pretty much sure that my column family should occupy
Hi All!
I have a problem with using cassandra. Our application does a lot of
overwrites and deletes. If I understand correctly cassandra does not
actually delete these objects until gc_grace seconds have passed. I tried
to "force" gc by setting gc_grace to 0 on an existing column
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