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<https://twitter.com/calonso> On 18 August 2016 at 11:56, Lu, Boying <boying...@emc.com<mailto: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
