[prev in list] [next in list] [prev in thread] [next in thread] 

List:       cassandra-user
Subject:    =?gb18030?B?u9i4tKO6IG5vZGV0b29sIGNsZWFudXAgaW4gcGFy?= =?gb18030?B?YWxsZWw=?=
From:       "=?gb18030?B?UGVuZyBYaWFv?=" <2535053 () qq ! com>
Date:       2017-09-27 4:25:17
Message-ID: tencent_DEACA60B56FB8EA41B6D97D0A61064939307 () qq ! com
[Download RAW message or body]

[Attachment #2 (text/plain)]

Thanks Kurt.




------------------ ԭʼÓʼþ ------------------
·¢¼þÈË: "kurt";<kurt@instaclustr.com>;
·¢ËÍʱ¼ä: 2017Äê9Ô 27ÈÕ(ÐÇÆÚÈý) ÖÐÎç11:57
ÊÕ¼þÈË: "User"<user@cassandra.apache.org>;

Ö÷Ìâ: Re: nodetool cleanup in parallel



correct. you can run it in parallel across many nodes if you have capacity. generally \
see about a 10% CPU increase from cleanups which isn't a big deal if you have the \
capacity to handle it + the io.

on that note on later versions you can specify -j <num jobs> to run multiple cleanup \
compactions at the same time on a single node, and also increase compaction \
throughput to speed the process up.


On 27 Sep. 2017 13:20, "Peng Xiao" <2535053@qq.com> wrote:
hi,


nodetool cleanup will only remove those keys which no longer belong to those \
nodes,than theoretically we can run nodetool cleanup in parallel,right?the document \
suggests us to run this one by one,but it's too slow.


Thanks,
Peng Xiao


[Attachment #3 (text/html)]

<div>Thanks Kurt.</div><div><div><br></div><div><br></div><div style="font-size: \
12px;font-family: Arial Narrow;padding:2px 0 2px \
0;">------------------&nbsp;ԭʼÓʼþ&nbsp;------------------</div><div \
style="font-size: 12px;background:#efefef;padding:8px;"><div><b>·¢¼þÈË:</b>&nbsp;"kurt";&lt;kurt@instaclustr.com&gt;;</div><div><b>·¢ËÍʱ¼ä:</b>&nbsp;2017Äê9Ô \
27ÈÕ(ÐÇÆÚÈý) ÖÐÎç11:57</div><div><b>ÊÕ¼þÈË:</b>&nbsp;"User"&lt;user@cassandra.apache.org&gt;;<wbr></div><div></div><div><b>Ö÷Ìâ:</b>&nbsp;Re: \
nodetool cleanup in parallel</div></div><div><br></div><div dir="auto">correct. you \
can run it in parallel across many nodes if you have capacity. generally see about a \
10% CPU increase from cleanups which isn't a big deal if you have the capacity to \
handle it + the io.<div dir="auto"><br></div><div dir="auto">on that note on later \
versions you can specify -j &lt;num jobs&gt; to run multiple cleanup compactions at \
the same time on a single node, and also increase compaction throughput to speed the \
process up.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 27 \
Sep. 2017 13:20, "Peng Xiao" &lt;<a \
href="mailto:2535053@qq.com">2535053@qq.com</a>&gt; wrote:<br \
type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px \
#ccc solid;padding-left:1ex"><div>hi,</div><div><br></div><div>nodetool cleanup will \
only remove those keys which no longer belong to those nodes,than theoretically we \
can run nodetool cleanup in parallel,right?the document suggests us to run this one \
by one,but it's too slow.</div><div><br></div><div>Thanks,</div><div>Peng \
Xiao</div><div><span \
style="color:rgb(51,51,51);font-family:arial;font-size:13px"></span></div></blockquote></div><br></div></div>




[prev in list] [next in list] [prev in thread] [next in thread]