Ceph performance issues

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The FUSE client is the most accessible and the easiest to upgrade to the version of Ceph used by the storage cluster, while the kernel client will always gives better performance. When encountering bugs or performance issues, it is often instructive to try using the other client, in order to find out whether the bug was client-specific or not ...
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Ceph is a unified, distributed storage system designed for excellent performance, reliability, and scalability. The ceph-radosgw charm deploys the RADOS Gateway, a S3 and Swift compatible HTTP gateway. The deployment is done within the context of an existing Ceph cluster. Usage Configuration
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Killing the Storage Unicorn: Purpose-Built ScaleIO Spanks Multi-Purpose Ceph on Performance. Posted on Aug 4, 2015 by Randy Bias. Collectively it's clear that we've all had it with the cost of storage, particularly the cost to maintain and operate storage systems.
A Red Hat Ceph Storage cluster is built from two or more Ceph nodes to provide scalability, fault-tolerance, and performance. Each node uses intelligent daemons that communicate with each other to: May 27, 2016 · Allocating memory to work with your data is something that Ceph will do a lot. When researching latency issues with our OSDs we picked up on the discussion around which memory allocator Ceph works best with. At the moment the best performance recommendation is jemalloc which adds a little more memory usage but is generally faster. People did in-depth testing which shows the details and edge cases. Every day and every week (deep), Ceph scrubs operations that, although they are throttled, can still impact performance. You can modify the interval and the hours that control the scrub action. Once per day and once per week are likely fine.
Issue health warning if a performance issue is occurring especially for ceph-osd client responses. David Zafman: 10/19/2020 07:23 PM: 47730: rgw: Cleanup: New: Normal: investigate pvs studio report on RGW: 10/04/2020 03:22 PM: easy first bug: 47728: mgr: Feature: In Progress: Normal: mgr/dashboard: add fields 'dirs' and 'caps' 10/02/2020 01:57 ...Ceph was made possible by a global community of passionate storage engineers, researchers, and users. This community works hard to continue the Open Source ideals that the project was founded upon, and provide a number of ways for new and experienced users to get involved. Ceph nodes use the network for communicating with each other. Networking issues can cause many problems with OSDs, such as flapping OSD, or OSD incorrectly reported as down. Networking issues can also cause Monitor clock skew errors. In addition, packet loss, high latency, or limited bandwidth can impact the cluster performance and stability.
Oct 10, 2017 · Odd network traffic can indicate other issues, like run-away clients, pre-failed hard drives, and much more. Let’s face it, being scale-out storage, Ceph is as much dependent on a high performing network as it is on the storage. And to operate Ceph successfully, you need all the information you can get from the network.
Ceph (pronounced / ˈ s ɛ f /) is an open-source software storage platform, implements object storage on a single distributed computer cluster, and provides 3-in-1 interfaces for object-, block-and file-level storage.
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