Re: Is replication possible with already existing data?

2015-10-12 Thread Carlos Alonso
Yes Ajay, in your particular scenario, after all hints are delivered, both CAS11 and CAS12 will have the exact same data. Cheers! Carlos Alonso | Software Engineer | @calonso On 11 October 2015 at 05:21, Ajay Garg wrote: > Thanks a ton

Re: Post portem of a large Cassandra datacenter migration.

2015-10-12 Thread Sebastian Estevez
For 1 and 3 have you looked CASSANDRA-8611 For 4, you don't need to attach a profiler to check if GC is a problem. Just grep the system log for GCInspector. All the best, [image: datastax_logo.png] Sebastián

Re: Snapshots - Backup/Restore requirements

2015-10-12 Thread Jeff Ferland
I have a semi-hacky Python script I’ve written up. It needs refining for public use, but I’ll put it in Github later today and send you a link as I work on it. It uses boto to do concurrent multi-part uploads to S3 with retry and resume recording function if it gets interrupted while uploading

Snapshots - Backup/Restore requirements

2015-10-12 Thread Jason Turner
We have recently created production ready Cassandra clusters and we are currently trying to create and implement a robust Backup/Restore process. We are hosting our Cassandra VMs in AWS and we understand the Snapshot process, but we are unclear on the best way to get Snapshots backed up off the

Re: Cassandra mountable data store

2015-10-12 Thread Eric Stevens
You cannot busy throw bigger and bigger disks at a cluster that is accumulating data as it fills up. This is due to data grooming tasks that increase in cost as your data density per node increases (for example, compaction), as well as other factors that are impacted by data density (such as

Re: A number of questions on LeveledCompactionStrategy

2015-10-12 Thread Jeff Ferland
> On Oct 10, 2015, at 9:24 AM, San Luoji wrote: > > Hi, > > I've got a number of questions when looking into LCS in Cassandra. Could > somebody help to enlighten me? > > 1. Will LCS always strive to clean up L0 sstable? i.e. whenever a new L0 > sstable shows up, it will

Re: cassandra 3.0 rc1 and datastax java driver 3.0.0 alpha3

2015-10-12 Thread Alex Popescu
You'll have better chances to get an answer directly on the Java driver mailing list: https://groups.google.com/a/lists.datastax.com/forum/#!forum/java-driver-user thanks On Sat, Oct 10, 2015 at 4:30 PM, Vova Shelgunov wrote: > Hi all, > > I've tried to connect to the

Re: Snapshots - Backup/Restore requirements

2015-10-12 Thread Robert Coli
On Mon, Oct 12, 2015 at 9:41 AM, Jeff Ferland wrote: > I have a semi-hacky Python script I’ve written up. It needs refining for > public use, but I’ll put it in Github later today and send you a link as I > work on it. It uses boto to do concurrent multi-part uploads to S3

Re: Snapshots - Backup/Restore requirements

2015-10-12 Thread Jeff Ferland
Yeah, that’s got plenty of promise looking at it the 2nd time around. What turned me off from using it was the combination of not having a single-shot backup mode and appearing to only run in inotify mode which would just chuck in every compaction. It looks like when reading it through its

Re: Snapshots - Backup/Restore requirements

2015-10-12 Thread Robert Coli
On Mon, Oct 12, 2015 at 3:28 PM, Jeff Ferland wrote: > Yeah, that’s got plenty of promise looking at it the 2nd time around. What > turned me off from using it was the combination of not having a single-shot > backup mode and appearing to only run in inotify mode which