Trouble After Changing Replication Factor

2021-10-10 Thread Isaeed Mohanna
Hi We had a cluster with 3 Nodes with Replication Factor 2 and we were using read with consistency Level One. We recently added a 4th node and changed the replication factor to 3, once this was done apps reading from DB with CL1 would receive an empty record, Looking around I was surprised to le

Re: Trouble After Changing Replication Factor

2021-10-11 Thread Bowen Song
You have RF=3 and both read & write CL=1, which means you are asking Cassandra to give up strong consistency in order to gain higher availability and perhaps slight faster speed, and that's what you get. If you want to have strong consistency, you will need to make sure (read CL + write CL) > R

RE: Trouble After Changing Replication Factor

2021-10-12 Thread Isaeed Mohanna
request will actually return a correct result? Thanks From: Bowen Song Sent: Monday, October 11, 2021 5:13 PM To: user@cassandra.apache.org Subject: Re: Trouble After Changing Replication Factor You have RF=3 and both read & write CL=1, which means you are asking Cassandra to give up st

Re: Trouble After Changing Replication Factor

2021-10-12 Thread Bowen Song
onday, October 11, 2021 5:13 PM *To:* user@cassandra.apache.org *Subject:* Re: Trouble After Changing Replication Factor You have RF=3 and both read & write CL=1, which means you are asking Cassandra to give up strong consistency in order to gain higher availability and perhaps slight faster s

Re: Trouble After Changing Replication Factor

2021-10-12 Thread Dmitry Saprykin
; > Thanks > > > > *From:* Bowen Song > *Sent:* Monday, October 11, 2021 5:13 PM > *To:* user@cassandra.apache.org > *Subject:* Re: Trouble After Changing Replication Factor > > > > You have RF=3 and both read & write CL=1, which means you are asking >

Re: Trouble After Changing Replication Factor

2021-10-12 Thread Jeff Jirsa
request will actually return a correct result? > > > > Thanks > > > > *From:* Bowen Song > *Sent:* Monday, October 11, 2021 5:13 PM > *To:* user@cassandra.apache.org > *Subject:* Re: Trouble After Changing Replication Factor > > > > You have RF=3

RE: Trouble After Changing Replication Factor

2021-10-13 Thread Isaeed Mohanna
t will actually return a correct result? Thanks From: Bowen Song mailto:bo...@bso.ng>> Sent: Monday, October 11, 2021 5:13 PM To: user@cassandra.apache.org<mailto:user@cassandra.apache.org> Subject: Re: Trouble After Changing Replication Factor You have RF=3 and both read & write