Hi,
There are two ways to upgrade SSTables: - online (C* must be UP): nodetool
upgradesstables - offline (when C* is stopped): using the tool called
"sstableupgrade". It's located in the bin directory of Cassandra so
depending on how you installed Cassandra, it may be on the path. See
https://docs.datastax.com/en/cassandra/2.0/cassandra/tools/ToolsSSTableupgrade_t.html
Few questions: - Did you check you are not hitting
https://github.com/apache/cassandra/blob/cassandra-2.0/NEWS.txt#L162 ? i.e.
are you sure that all your data are in "ic" format? - Why did you choose
2.0.10? (The latest 2.0 release being 2.0.17.) Best, Romain
Le Vendredi 19 août 2016 5h18, "Lu, Boying" <boying...@emc.com> a écrit :
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div.yiv8524026874WordSection1 {}#yiv8524026874 Thanks a lot. I’m a little
bit of confusing. If the ‘nodetool updatesstable’ doesn’t work without
Cassandra server running, and Cassandra server failed to start due to the
incompatible SSTable format, how to resolve this dilemma? From:
Carlos Alonso [mailto:i...@mrcalonso.com]
Sent: 2016年8月18日 18:44
To: user@cassandra.apache.org
Subject: Re: A question to updatesstables Replies inline
Carlos Alonso | Software Engineer | @calonso On 18 August 2016 at 11:56,
Lu, Boying <boying...@emc.com> wrote: Hi, All, We use Cassandra in our
product. I our early release we use Cassandra 1.2.10 whose SSTable is ‘ic’
format. We upgrade Cassandra to 2.0.10 in our product release. But the
Cassandra server failed to start due to the incompatible SSTable format and the
log message told us to use ‘nodetool updatesstables’ to upgrade SSTable files.
To make sure that no negative impact on our data, I want to confirm following
things about this command before trying it: 1. Does it work without
Cassandra server running? No, it won't.
2. Will it cause data lost with this command?
It shouldn't if you followed the upgrade instructions properly
3. What’s the best practice to void this error occurs again (e.g.
upgrading Cassandra next time)?
Upgrading SSTables is required or not depending on the upgrade you're running,
basically if the SSTables layout changes you'll need to run it and not
otherwise so there's nothing you can do to avoid it
Thanks Boying
