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Cassandra is not showing a node up hours after restart - Cassandra - [mail # user]
...Which version of Cassandra did you install? deb or tar?If it's deb, its script should be used for start/stop.If it's tar, kill pid of cassandra to stop and use bin/cassandra to start.Stop do...
   Author: Hossein Ghiyasi Mehr , 2019-12-08, 10:47
No progress in compactionstats - Cassandra - [mail # user]
...Hi,Check nodetool tpstats output.*-------------------------------------------------------**VafaTech  : A Total Solution for Data Gathering &Analysis**-----------------------------------...
   Author: Hossein Ghiyasi Mehr , 2019-12-05, 11:29
[expand - 2 more] - "Maximum memory usage reached (512.000MiB), cannot allocate chunk of 1.000MiB" - Cassandra - [mail # user]
..."3. Though Datastax do not recommended and recommends Horizontal scale, sobased on your requirement alternate old fashion option is to add swapspace."Hi Shishir,swap isn't recommended by Dat...
   Author: Hossein Ghiyasi Mehr , 2019-12-04, 10:43
[expand - 3 more] - Optimal backup strategy - Cassandra - [mail # user]
...I am sorry! This is true. I forgot "*not*"!1. It's *not* recommended to use commit log after one node failure.Cassandra has many options such as replication factor assubstitute solution.*Vaf...
   Author: Hossein Ghiyasi Mehr , 2019-12-03, 09:32
Select statement in batch - Cassandra - [mail # user]
...Hello,Batch isn't for selet only query, it's for transactional queries. If youwant to read data, you should use select query (prepared or simple or etc.)On Fri, Oct 11, 2019 at 5:50 PM Inqui...
   Author: Hossein Ghiyasi Mehr , 2019-10-26, 14:05
TWCS and gc_grace_seconds - Cassandra - [mail # user]
...It needs to change gc_grace_seconds carefully because it has side effect onhinted handoff.On Fri, Oct 18, 2019 at 5:04 PM Paul Chandler  wrote:> Hi Adarsh,>> You will have prob...
   Author: Hossein Ghiyasi Mehr , 2019-10-26, 13:45
Repair Issues - Cassandra - [mail # user]
...If the problem exist still, and all nodes are up, reboot them one by one.Then try to repair one node. After that repair other nodes one by one.On Fri, Oct 25, 2019 at 12:56 AM Ben Mills &nbs...
   Author: Hossein Ghiyasi Mehr , 2019-10-26, 13:17
[expand - 2 more] - [EXTERNAL] Cassandra Export error in COPY command - Cassandra - [mail # user]
...I tested dsbulk too. But there are many errors:"[1710949318] Error writing cancel request. This is not critical (therequest will eventually time out server-side).""Forcing termination of Con...
   Author: Hossein Ghiyasi Mehr , 2019-10-24, 09:24
Update/where statement Adds Row - Cassandra - [mail # user]
...Update in Cassandra is upsert (update or insert). So when you update a rowwhich isn't exist, it will create it."IF EXIST" can be used in some queries.On Thu, Sep 12, 2019 at 8:35 AM A  ...
   Author: Hossein Ghiyasi Mehr , 2019-09-12, 08:20
Fwd: Cassandra Export error in COPY command - Cassandra - [mail # user]
...---------- Forwarded message ---------From: Hossein Ghiyasi Mehr Date: Sun, Sep 8, 2019 at 11:38 AMSubject: Cassandra Export error in COPY commandTo: Hi all members,I want to export (pk, ano...
   Author: Hossein Ghiyasi Mehr , 2019-09-11, 11:13