Decommission the two nodes, one at a time (assumes you have enough disk space on the remaining hosts). That will move the data to the remaining nodes and keep RF=3. Then fix the host. Then add the hosts back into the cluster, one at a time. This is easier with vnodes. Finally, run clean-up on the 6 nodes that stayed up to recover disk space.
Sean Durity lord of the (C*) rings (Staff Systems Engineer – Cassandra) MTC 2250 #cassandra - for the latest news and updates From: Alaa Zubaidi (PDF) [mailto:alaa.zuba...@pdf.com] Sent: Thursday, December 14, 2017 2:00 PM To: user@cassandra.apache.org Subject: [EXTERNAL] Bring 2 nodes down Hi, I have a cluster of 8 Nodes, 4 physical machines 2 VMs each physical machine. RF=3, and we have read/write with QUORUM consistency requirement. One of the machines needs to be down for an hour or two to fix local disk. What is the best way to do that with out losing data? Regards -- Alaa This message may contain confidential and privileged information. If it has been sent to you in error, please reply to advise the sender of the error and then immediately permanently delete it and all attachments to it from your systems. If you are not the intended recipient, do not read, copy, disclose or otherwise use this message or any attachments to it. The sender disclaims any liability for such unauthorized use. PLEASE NOTE that all incoming e-mails sent to PDF e-mail accounts will be archived and may be scanned by us and/or by external service providers to detect and prevent threats to our systems, investigate illegal or inappropriate behavior, and/or eliminate unsolicited promotional e-mails (“spam”). If you have any concerns about this process, please contact us at legal.departm...@pdf.com<mailto:legal.departm...@pdf.com>. ________________________________ 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.
