I’m without laptop this week but looks like
CompactionTask#reduceScopeForLimitedSpace
So maybe it just comes for free with UCS
> On Mar 17, 2023, at 6:21 PM, Jeremy Hanna wrote:
>
> You're right that it doesn't handle it in the sense that it doesn't resolve
> it the problem, but it also
You're right that it doesn't handle it in the sense that it doesn't resolve it
the problem, but it also doesn't do what STCS does. From what I've seen, STCS
blindly tries to compact and then the disk will fill up triggering the disk
failure policy. With UCS it's much less likely and if it
> On Mar 17, 2023, at 1:46 PM, Jeremy Hanna wrote:
>
>
>
> One much more graceful element of UCS is that instead of what was previously
> done with compaction strategies where the server just shuts down when running
> out of space - forcing system administrators to be paranoid about
On Fri, 17 Mar 2023 at 17:24, Brandon Williams wrote:
> On Fri, Mar 17, 2023 at 9:25 AM Mick Semb Wever wrote:
> > Question/Suggestion: should we improve gossip to include what the oldest
> format a node has, and ensure newer versioned node joining fail/warn if it
> does > not support that
+1
Kind Regards,
Brandon
On Thu, Mar 16, 2023 at 3:11 AM Miklosovic, Stefan
wrote:
>
> Proposing the test build of Cassandra 4.1.1 for release.
>
> sha1: 8d91b469afd3fcafef7ef85c10c8acc11703ba2d
> Git:
> https://gitbox.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=refs/tags/4.1.1-tentative
I think it's important to highlight a few of practical elements of this work
that may not be completely clear.
Sharding ranges allows for parallel compactions - taking advantage of
additional CPUs on the server. This allows compactions to keep up much easier.
One much more graceful element of
> we (including me) have done a lot of stupid shit over the years on this
> project. Half the time “this is how we’ve historically done X” to me is a
> strong argument to start doing things differently.
Oof. The truth (when applied to myself) hurts doesn't it? :)
> I suggest we should have a
+1
On Fri, Mar 17, 2023, at 12:18 PM, Aleksey Yeshchenko wrote:
> +1
>
>> On 17 Mar 2023, at 13:54, Mick Semb Wever wrote:
>>
>>> The vote will be open for 72 hours (longer if needed). Everyone who has
>>> tested the build is invited to vote. Votes by PMC members are considered
>>> binding.
Could we get a JIRA for this too so we can get some reviewers collaborating on
this? Only see Lorina's ticket for documenting it in JIRA atm.
On Fri, Mar 17, 2023, at 9:53 AM, Branimir Lambov wrote:
> The prototype of UCS can now be found in this pull request:
>
> As for precedent - we (including me) have done a lot of stupid shit over the
> years on this project. Half the time “this is how we’ve historically done X”
> to me is a strong argument to start doing things differently. This is one
> such case.
+1. I definitely agree that this is one area
On Fri, Mar 17, 2023 at 9:25 AM Mick Semb Wever wrote:
> Question/Suggestion: should we improve gossip to include what the oldest
> format a node has, and ensure newer versioned node joining fail/warn if it
> does > not support that older format? That is, should we give a clear signal
> back
+1
> On 17 Mar 2023, at 13:54, Mick Semb Wever wrote:
>
>> The vote will be open for 72 hours (longer if needed). Everyone who has
>> tested the build is invited to vote. Votes by PMC members are considered
>> binding. A vote passes if there are at least three binding +1s and no -1's.
>
>
>
> Saying that there is never any complexity and we should keep formats in
> perpetuity, and I'm sitting here having a heart attack, srsly.
Nobody is claiming that. Don’t let a straw man give you a heart attack.
> Though I _always_ recommend users upgrade all sstables, before and after
> every
Ok ok, there's a number of strong arguments to keep sstable formats around
for much longer than the previous major Cassandra version, I will unset
fixVersion on 18312 :-)
Taking a look at the history of sstable formats. They were first introduced
in version 0.7, and minor versions introduced in
>
> The vote will be open for 72 hours (longer if needed). Everyone who has
> tested the build is invited to vote. Votes by PMC members are considered
> binding. A vote passes if there are at least three binding +1s and no -1's.
>
+1
Checked
- signing correct
- checksums are correct
- source
The prototype of UCS can now be found in this pull request:
https://github.com/apache/cassandra/pull/2228
Its description is given in the included markdown documentation:
https://github.com/blambov/cassandra/blob/UCS-density/src/java/org/apache/cassandra/db/compaction/UnifiedCompactionStrategy.md
You can initiate that vote if you want, I do not see any problem with that.
Please be aware that there is ongoing vote on 4.1.1 release so we have couple
of options:
a) someone posts binding -1 there which will render that vote as failed.
b) the voting on 4.1.1 just passes and we release it as
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