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Date: Wed, 9 Dec 2009 13:16:53 +0200
Message-ID: <468b21170912090316q6c3be9b0u767a22b220a9ece2@mail.gmail.com>
Subject: Regarding Pending Task in MBeam Column family
From: Richard Grossman <richiesgr@gmail.com>
To: cassandra-user@incubator.apache.org
Content-Type: multipart/alternative; boundary=001485f79366eee4d8047a49d361

--001485f79366eee4d8047a49d361
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Hi

what the purpose of pending task attribute value. In my case I've written a
multi threaded client to insert a large dataset in cassandra. So I check the
numbers in Jconsole.

I see the write latency : ~0.02 ~0.07
Writecount up

but the pending task stay to 0. This params is not affected by not
insertion.

By the way my problem is that I can't achieve to have better insert than 75
rows/s per thread. which ridiculous for cassandra. But more strange is that
i can add more thread like 10 or 20 each of them work exactly to 75 rows/s

so here I'm lost 1 thread > 75 rows /s
                        5 threads > 75 * 5 rows /s

Someone can explain the logical here
I use the 0.5.0-beta1 from tags

Thanks

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi<br><br>what the purpose of pending task attribute value=
. In my case I&#39;ve written a multi threaded client to insert a large dat=
aset in cassandra. So I check the numbers in Jconsole.<br><br>I see the wri=
te latency : ~0.02 ~0.07<br>
Writecount up<br><br>but the pending task stay to 0. This params is not aff=
ected by not insertion.<br><br>By the way my problem is that I can&#39;t ac=
hieve to have better insert than 75 rows/s per thread. which ridiculous for=
 cassandra. But more strange is that i can add more thread like 10 or 20 ea=
ch of them work exactly to 75 rows/s <br>
<br>so here I&#39;m lost 1 thread &gt; 75 rows /s <br>=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 5 threads &gt; 75 * 5 rows=
 /s <br><br>Someone can explain the logical here<br>I use the 0.5.0-beta1 f=
rom tags<br><br>Thanks <br>=A0<br></div>

--001485f79366eee4d8047a49d361--