Hi, I'd like to know your opinion on this new Dell product: http://www.dell.com/learn/us/en/555/campaigns/dell-fluid-cache-for-san?c=us&l;en&s;biz Is there any possibility to reproduce it as a zfs based solution? Here are a couple of posts by one of the engineers who worked on it: " I doubt ZFS can share in-server PCIe SSD's over the network using RDMA (RoCE / IB) for fault-tolerant write-back cache on 8 servers simultaneously." " Every server has local PCIe SSDs used for caching. Dirty blocks are replicated to other nodes during write-back caching until the dirty data can be flushed to the backing store. We provide virtual block devices locally (our VMWare solution uses iSCSI / iSER to expose the virtual block devices to guest VMs, our bare-metal solution just creates local block devices -- no iSCSI involved). Cache blocks are distributed among the nodes using a round-robin-like algorithm. No multicast involved. Writes to the backing store only happen on a single cache server -- whichever cache server owns the block does the write. Block clients read/write blocks directly to whichever cache server owns the block -- locally or remotely via RDMA over ethernet (RoCE). Cache servers read/write to the backing store via multi-initiator iSCSI or FC SAN." Gabriele Bulfon - Sonicle S.r.l. Tel +39 028246016 Int. 30 - Fax +39 028243880 via Santa Maria Valle 3 - 20123 - Milano - Italy http://www.sonicle.com
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