3000 tables On Tuesday, June 2, 2020, Durity, Sean R <sean_r_dur...@homedepot.com> wrote:
> How many total tables in the cluster? > > > > > > Sean Durity > > > > *From:* Jai Bheemsen Rao Dhanwada <jaibheem...@gmail.com> > *Sent:* Monday, June 1, 2020 8:36 PM > *To:* user@cassandra.apache.org > *Subject:* [EXTERNAL] Re: Cassandra Bootstrap Sequence > > > > Thanks Erick, > > > > I see below tasks are being run mostly. I didn't quite understand what > exactly these scheduled tasks are for? Is there a way to reduce the boot-up > time or do I have to live with this delay? > > > > $ zgrep "CompactionStrategyManager.java:380 - Recreating compaction > strategy" debug.log* | wc -l > 3249 > $ zgrep "DiskBoundaryManager.java:53 - Refreshing disk boundary cache for" > debug.log* | wc -l > 6293 > $ zgrep "DiskBoundaryManager.java:92 - Got local ranges" debug.log* | wc > -l > 6308 > $ zgrep "DiskBoundaryManager.java:56 - Updating boundaries from > DiskBoundaries" debug.log* | wc -l > 3249 > > > > > > > > > > > > On Mon, Jun 1, 2020 at 5:01 PM Erick Ramirez <erick.rami...@datastax.com> > wrote: > > There's quite a lot of steps that takes place during the startup sequence > between these 2 lines: > > > > > *INFO [main] 2020-05-31 23:51:15,555 Gossiper.java:1723 - No gossip > backlog; proceeding *INFO [main] 2020-05-31 23:54:06,867 > NativeTransportService.java:70 - Netty using native Epoll event loop > > > > For the most part, it's taken up by CompactionStrategyManager and > DiskBoundaryManager. If you check debug.log, you'll see that it's mostly > updating disk boundaries. The length of time it takes is proportional to > the number of tables in the cluster. > > > > Have a look at this section [1] of CassandraDaemon if you're interested > in the details of the startup sequence. Cheers! > > > > [1] https://github.com/apache/cassandra/blob/cassandra-3.11. > 3/src/java/org/apache/cassandra/service/CassandraDaemon.java#L399-L435 > [github.com] > <https://urldefense.com/v3/__https:/github.com/apache/cassandra/blob/cassandra-3.11.3/src/java/org/apache/cassandra/service/CassandraDaemon.java*L399-L435__;Iw!!M-nmYVHPHQ!dt_R3xGLIK4vc3FdekacgZnl6PDJVAqW_c-yBaIAmQsoVKp7SoW7VeM3gc7VSLx2KgcKBSE$> > > > ------------------------------ > > The information in this Internet Email is confidential and may be legally > privileged. It is intended solely for the addressee. Access to this Email > by anyone else is unauthorized. If you are not the intended recipient, any > disclosure, copying, distribution or any action taken or omitted to be > taken in reliance on it, is prohibited and may be unlawful. When addressed > to our clients any opinions or advice contained in this Email are subject > to the terms and conditions expressed in any applicable governing The Home > Depot terms of business or client engagement letter. The Home Depot > disclaims all responsibility and liability for the accuracy and content of > this attachment and for any damages or losses arising from any > inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other > items of a destructive nature, which may be contained in this attachment > and shall not be liable for direct, indirect, consequential or special > damages in connection with this e-mail message or its attachment. >
