RE: TWCS Log Warning

n On Thu, May 23, 2024 at 7:35 AM Bowen Song via user mailto:user@cassandra.apache.org>> wrote: As the log level name "DEBUG" suggested, these are debug messages, not warnings. Is there any reason made you believe that these messages are warnings? On 23/05/2024 11:10, Isaeed

TWCS Log Warning

Hi I have a big table (~220GB reported by used space live by tablestats) with time series data that uses TWCS with the following settings compaction = {'class': 'org.apache.cassandra.db.compaction.TimeWindowCompactionStrategy', 'compaction_window_size': '7', 'compaction_window_unit': 'DAYS', 'm

RE: Trouble After Changing Replication Factor

wait for the changes but I think it should be added to the documentation to warn that read with CL1 will fail until a full repair is completed. Thanks everyone for the help, Isaeed Mohanna From: Jeff Jirsa Sent: Tuesday, October 12, 2021 4:59 PM To: cassandra Subject: Re: Trouble After Changing

RE: Trouble After Changing Replication Factor

rong 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) > RF. On 10/10/2021 11:55, Isaeed Mohanna wrote: Hi We had a cluster with 3 Nodes with Replicat

Trouble After Changing Replication Factor

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: TWCS on Non TTL Data

e table holding the near-term data other than the overall free disk space. There's only a time limit on that table. On 17/09/2021 16:51, Isaeed Mohanna wrote: Thank for the help, How does the compaction run? Does it clean old compaction files while running or only at the end, I want to manage t

RE: TWCS on Non TTL Data

Non TTL Data You may try roll up the data, i.e. a table only 1 month data, old data roll up to a table keep a year data. Thanks, Jim On Wed, Sep 15, 2021 at 1:26 AM Isaeed Mohanna mailto:isa...@xsense.co>> wrote: My cluster column is the time series timestamp, so basically sourceId,

RE: TWCS on Non TTL Data

week bucket, I could later change the time window right? Thanks From: Jeff Jirsa Sent: Tuesday, September 14, 2021 10:35 PM To: cassandra Subject: Re: TWCS on Non TTL Data Inline On Tue, Sep 14, 2021 at 11:47 AM Isaeed Mohanna mailto:isa...@xsense.co>> wrote: Hi Jeff My data is partitio

RE: TWCS on Non TTL Data

Subject: Re: TWCS on Non TTL Data On Tue, Sep 14, 2021 at 5:42 AM Isaeed Mohanna mailto:isa...@xsense.co>> wrote: Hi I have a table that stores time series data, the data is not TTLed since we want to retain the data for the foreseeable future, and there are no updates or deletes. (deletes

TWCS on Non TTL Data

Hi I have a table that stores time series data, the data is not TTLed since we want to retain the data for the foreseeable future, and there are no updates or deletes. (deletes could happens rarely in case some scrambled data reached the table, but its extremely rare). Usually we do constant wri