Yakir is correct. While it is feasible to have large disk nodes, the practical aspect of managing them is an issue. With the current technology, I do not build nodes with more than about 3.5 TB of disk available. I prefer 1-2 TB, but costs/number of nodes can change the considerations.
Putting more than 1 node of Cassandra on a given host is also possible, but you will want to consider your availability if that hardware goes down. Losing 2 or more nodes with one failure is usually not good. NOTE: DataStax has some new features for supporting much larger disks and alleviating many of the admin pains associated with it. I don’t have personal experience with it, yet, but I will be testing it soon. In my understanding it is for use cases with massive needs for disk, but low to moderate throughput (ie, where node expansion is only for disk, not additional traffic). Sean Durity From: Yakir Gibraltar <yaki...@gmail.com> Sent: Wednesday, January 20, 2021 9:21 AM To: user@cassandra.apache.org Subject: [EXTERNAL] Re: Node Size It possible to use large nodes and it will work, the problem of large nodes will be: * Maintenance like join/remove nodes will take more time. * Larger heap * etc. On Wed, Jan 20, 2021 at 3:54 PM Joe Obernberger <joseph.obernber...@gmail.com<mailto:joseph.obernber...@gmail.com>> wrote: Anyone know where I could find out more information on this? Thanks! -Joe On 1/13/2021 8:42 AM, Joe Obernberger wrote: > Reading the documentation on Cassandra 3.x there is recommendations > that node size should be ~1TByte of data. Modern servers can have 24 > SSDs, each at 2TBytes in size for data. Is that a bad idea for > Cassandra? Does 4.0beta4 handle larger nodes? > We have machines that have 16, 8TBytes SATA drives - would that be a > bad server for Cassandra? Would it make sense to run multiple copies > of Cassandra on the same node in that case? > > Thanks! > > -Joe > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org<mailto:user-unsubscr...@cassandra.apache.org> For additional commands, e-mail: user-h...@cassandra.apache.org<mailto:user-h...@cassandra.apache.org> -- בברכה, יקיר גיברלטר ________________________________ The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.
