Gossip Behavioral Difference between C* 2.0 and C* 2.1

, Michael Fong

C* 1.2.x vs Gossip marking DOWN/UP

that busy compaction activities would cause this behavior, but we cannot reason why this could happen logically. How come a compaction operation would stop the Gossip thread to perform heartbeat check? Has anyone experienced this kind of behavior before? Thanks in advanced! Sincerely, Michael Fong

Effectiveness of Scrub Operation vs SSTable previously marked in blacklist

sEmpty(sstables)) return null; ... If it is true, would this flow - marking corrupted sstable in blacklist, defeat the original purpose of scrub operation? Thanks in advanced! Sincerely, Michael Fong

RE: Gossip heartbeat and packet capture

. :( After going through the source code of C* 1.2.15, the serialized gossip heartbeat message (SYN/ACK/ACK2) seem to contain 1. Cluster name, 2. Partitioner name in the payload. Perhaps I could grep the gossip heartbeat packet by filtering this criteria? Sincerely, Michael Fong From: sean_r_dur

Gossip heartbeat and packet capture

Hi, all, We are trying to reason the possible scenarios when a C*(v1.x) cluster connection keeps flapping in production. (Two node cluster, each node keeps marking the other node DOWN but came back UP within seconds; multiple times a day) We have checked the load on the cluster i- very light

RE: Cassandra 2.0.x OOM during startsup - schema version inconsistency after reboot

Hi, Thanks for your recommendation. I also opened a ticket to keep track @ https://issues.apache.org/jira/browse/CASSANDRA-11748 Hope this could brought someone's attention to take a look. Thanks. Sincerely, Michael Fong -Original Message- From: Michael Kjellman [mailto:mkjell

RE: Cassandra 2.0.x OOM during startsup - schema version inconsistency after reboot

storm begins. Also, thanks for your tip on sharing the SOP on stopping an ode, here is what we have for our stop procedure: Disable thrift Disable Binary Wait 10s Disable gossip Drain Kill Any thought on this to be further improved? Thanks! Sincerely, Michael Fong From: Alain RODRIGUEZ

Cassandra 2.0.x OOM during bootstrap

nks in advance! Sincerely, Michael Fong

RE: C* 1.2.x vs Gossip marking DOWN/UP

ol:273 ERROR - Transport exception in re-opening client in release on :{localhost(127.0.0.1):9160} Has anyone had similar experience? The operating system is Ubuntu and kernel version is 2.6.32.24. Thanks in advance! Sincerely, Michael fong From: Alain RODRIGUEZ [mailto:arodr...@gmail.com

RE: Cassandra 2.0.x OOM during bootstrap

for /192.168.88.34 DEBUG [OptionalTasks:1] 2016-04-19 11:19:18,337 MigrationManager.java (line 127) submitting migration task for /192.168.88.34 . Has anyone experienced this scenario? Thanks in advanced! Sincerely, Michael Fong From: Michael Fong [mailto:michael.f...@ruckuswireless.com] Sent

RE: Cassandra 2.0.x OOM during startsup - schema version inconsistency after reboot

need experts help on this. I don't know if anyone has seen this before, or if there is anything wrong with our migration flow though.. Thanks in advance. Best regards, Michael Fong From: Michael Fong [mailto:michael.f...@ruckuswireless.com] Sent: Thursday, April 21, 2016 6:41 PM To:

RE: Effectiveness of Scrub Operation vs SSTable previously marked in blacklist

Hi, I have filed a jira ticket to keep tracked @ https://issues.apache.org/jira/browse/CASSANDRA-11624 Thanks! Sincerely, Michael Fong From: Marcus Eriksson [mailto:krum...@gmail.com] Sent: Wednesday, March 23, 2016 10:47 PM To: user@cassandra.apache.org Subject: Re: Effectiveness of Scrub

Schema Disagreement vs Nodetool resetlocalschema

on-the-fly. We are thinking to do a nodetool resetlocalschema to force the schema synchronization. How safe is this method? Do we need to disable thrift/gossip protocol before performing this function, and enable them back after resync completes? Thanks in advance! Sincerely, Michael Fong

Is it possible to recover a deleted-in-future record?

if there is a general way to recover the mysteriously-deleted data when the timestamp meta is screwed up. Thanks in advanced, Regards, Michael Fong

Re: Maturity and Stability of Enabling CDC

anyone? On Wed, Sep 13, 2017 at 5:10 PM, Michael Fong <mcfong.o...@gmail.com> wrote: > Hi, all, > > We've noticed there is a new feature for streaming changed data other > streaming service. Doc: http://cassandra.apache.org/doc/latest/operating/ > cdc.html > > We a

Re: Maturity and Stability of Enabling CDC

Thanks Jeff! On Mon, Sep 18, 2017 at 9:31 AM, Jeff Jirsa <jji...@gmail.com> wrote: > Haven't tried out CDC, but the answer based on the design doc is yes - you > have to manually dedup CDC at the consumer level > > > > > -- > Jeff Jirsa > > > On Sep 17, 2

Re: Maturity and Stability of Enabling CDC

t; On 17 Sep. 2017 13:18, "Michael Fong" <mcfong.o...@gmail.com> wrote: > > anyone? > > On Wed, Sep 13, 2017 at 5:10 PM, Michael Fong <mcfong.o...@gmail.com> > wrote: > >> Hi, all, >> >> We've noticed there is a new feature for streaming ch

Maturity and Stability of Enabling CDC

Hi, all, We've noticed there is a new feature for streaming changed data other streaming service. Doc: http://cassandra.apache.org/doc/latest/operating/cdc .html We are evaluating the stability (and maturity) of this feature, and possibly integrate this with Kafka (associated w/ its connector).