Re: Facing issues while starting Cassandra

I faced similar issues with different locale settings. Could you try following command before running? export LC_ALL=C; Regards, Osman On Tue, 24 Dec 2019 at 09:01, Inquistive allen wrote: > > Hello Jeff, > > Thanks for responding. > I have validated the cassandra.yaml file with other hosts in t

inter dc bandwidth calculation

Hello, Is there any way to calculate inter dc bandwidth requirements for proper operation? I can't find any info about this subject. Can we say, how much sstable collected at one dc has to be transferred to other? I can calculate bandwidth with generated sstable then. I have twcs with one hour win

Re: inter dc bandwidth calculation

a quick-and-dirty heuristic, I'd probably take (write volume) > x (replication factor) x 2 as a guestimate so you have some headroom for C* > and TCP mechanics, but then monitor to see what your real use is. > > R > > > On 1/15/20, 4:14 AM, "Osman Yozgatl

one node down and cluster works better

Hello, I manage one cluster with 2 dc, 7 nodes each and replication factor is 2:2 My insertion performance dropped somehow. I restarted nodes one by one and found one node degrades performance. Verified this node after problem occurs a couple of times. How can I continue to investigate? Regards,

Re: one node down and cluster works better

Thanks Mehmet and Erick, I don't have any monitoring other than nodetool but I manage to see some disk errors cause exceptions. I changed faulty disk and performance ok now. Regards, Osman On Sun, 5 Apr 2020 at 03:17, Erick Ramirez wrote: > > With only 2 replicas per DC, it means you're likely

hints files at joining node

Hello, I have 2 dc cluster and trying to add a new node to one dc. It will take time since total data is huge at every node. I see waiting hints files at that joining node. What is that means? As I understand only coordinator nodes generates hints files. Is cluster uses this node as coordinator be

Re: hints files at joining node

Thank you all, I assume, my new node is used as coordinator, since all other nodes are under heavy write load. I need to spare some space for hints folder. Regards, Osman On Thu, 7 May 2020 at 08:29, Jeff Jirsa wrote: > > Incremental bootstrap patch changed the logic here. A node can act as a >

insertion rate change after stopping node

Hello, I have 2 DC 8+7 nodes Cassandra cluster with RF:2:2. Insertion rate dropped recently. If I stop an exact node, insertion rate goes normal. What should be the problem? Regards, Osman - To unsubscribe, e-mail: user-unsubscr

Re: insertion rate change after stopping node

Thanks, i'll check it out. Regards, Osman On Wed, 5 Aug 2020 at 21:15, Jeff Jirsa wrote: > > Potentially slow machine / bad cpu / bad disk / bad dimms. > > > On Wed, Aug 5, 2020 at 10:50 AM Osman Yozgatlıoğlu > wrote: >> >> Hello, >> >> I ha