Re: Re[2]: Redundancy inside a cassandra node

2014-11-08 Thread Jabbar Azam
ingle HDD on each node (we symlink some CF >> folders to other disk). SSD for CFs where we need low latency, HDD for >> binary data. If one of them fails, replication save us and we have >> time to deploy new node and load data from replicas with Cassandra repair >> feature back to ori

Re: Re[2]: Redundancy inside a cassandra node

2014-11-08 Thread Juho Mäkinen
stributing your >> cluster across multiple data centers. >> >> We're using single SSD and single HDD on each node (we symlink some CF >> folders to other disk). SSD for CFs where we need low latency, HDD for >> binary data. If one of them fails, replication

Re: Re[2]: Redundancy inside a cassandra node

2014-11-08 Thread Jabbar Azam
Cassandra repair > feature back to original node. And we have no problem with it, node fail > sometimes, but it doesn't affect customers. That is. > > > -- Original Message -- > From: "Jabbar Azam" > To: "user@cassandra.apache.org" > Sent:

Re: Redundancy inside a cassandra node

2014-11-08 Thread Jabbar Azam
ilability on node outage. > > -- Jack Krupansky > > *From:* Jabbar Azam > *Sent:* Friday, November 7, 2014 3:24 PM > *To:* user@cassandra.apache.org > *Subject:* Redundancy inside a cassandra node > > Hello all, > > My work will be deploying a cassandra cluster next year.

Re: Redundancy inside a cassandra node

2014-11-08 Thread Jack Krupansky
OOM issues. 2. Replication redundancy is also for supporting higher load, not just availability on node outage. -- Jack Krupansky From: Jabbar Azam Sent: Friday, November 7, 2014 3:24 PM To: user@cassandra.apache.org Subject: Redundancy inside a cassandra node Hello all, My work will be

Re: Re[2]: Redundancy inside a cassandra node

2014-11-08 Thread Eric Stevens
; binary data. If one of them fails, replication save us and we have > time to deploy new node and load data from replicas with Cassandra repair > feature back to original node. And we have no problem with it, node fail > sometimes, but it doesn't affect customers. That is. > > >

Re[2]: Redundancy inside a cassandra node

2014-11-08 Thread Plotnik, Alexey
doesn't affect customers. That is. -- Original Message -- From: "Jabbar Azam" mailto:aja...@gmail.com>> To: "user@cassandra.apache.org" mailto:user@cassandra.apache.org>> Sent: 08.11.2014 19:43:18 Subject: Re: Redundancy inside a cassandra node Hello Alexey, The

Re: Redundancy inside a cassandra node

2014-11-08 Thread Jabbar Azam
Hello Alexey, The node count is 20 per site and there will be two sites. RF=3. But since the software isn't complete and the database code is going through a rewrite we aren't sure about space requirements. The node count is only a guess, bases on the number of dev nodes in use. We will have bette

Re: Redundancy inside a cassandra node

2014-11-07 Thread Plotnik, Alexey
Cassandra is a cluster itself, it's not necessary to have redundant each node. Cassandra has replication for that. And also Cassandra is designed to run in multiple data center - am think that redundant policy is applicable for you. Only thing from your saying you can deploy is raid10, other don

Redundancy inside a cassandra node

2014-11-07 Thread Jabbar Azam
Hello all, My work will be deploying a cassandra cluster next year. Due to internal wrangling we can't seem to agree on the hardware. The software hasn't been finished, but management are asking for a ballpark figure for the hardware costs. The problem is the IT team are saying the nodes need to