cache tiering

  1. O

    How to setup storage with SSD and HDD

    Hello at all, I installed a Proxmox cluster with 3 cisco server nodes. Each node have 6 SSD's ( 2 x 240GB, 4 x 1TB) and 12 HDD with 2TB each. The first 2 SSDs are used as ZFS raid0 for the system itself. Now I have 4 SSDs(4 x 1TB) and 12HDDs(12x 2TB) left. My idea ist to use 2 of the HDDs in...
  2. A

    ceph can't disable tiering cache

    I switch cache-mode from writeback to proxy # ceph osd tier cache-mode rbd_nvme proxy But after cache-flush-evict-all (with errors) cache filled again # rados -p rbd_nvme cache-flush-evict-all | grep failed failed to flush /rbd_header.5a06de6b8b4567: (16) Device or resource busy failed to...
  3. T

    Compression or deduplication in Ceph

    I am currently running a proxmox 5.0 beta server with ceph (luminous) storage. I am trying to reduce the size of my ceph pools as I am running low on space. Does ceph have some kind of option to use compression or deduplication to reduce the size of the pool on disk?
  4. S

    Ceph cache tier and disk resizing

    Hello, i'm currently running a ceph cluster (Hammer), last weekend I implemented a cache tier (writeback mode) of SSDs for better performance. Everything seems fine except for disk resizing. I have a Windows VM with a raw RBD disk, i powered off the VM, resized the disk, verified that both ceph...
  5. D

    Flashcache vs Cache Tiering in Ceph

    Hi, I assembled a small Proxmox 4.1 cluster (3 Proxmox nodes + 1 NFS server for backup) using 1Gbit ethernet. All 3 nodes run OSDs (1x2T disks) with 10G SSD partitions for Journaling. My VMs use ceph rbd for storage. Now, I want to use SSDs for caching (either using free space on the...


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