I received a 1 TB PCIe 3430 MB/s SSD only to discover that I bought a module that needs to be installed in a carrier PCIe board :-( So while I wait on the post to bring me a carrier board, I thought I'd ask here.
I want all the text segment and similar quasi-static portions of the filesystem on the SSD for read performance. At the same time I want the redundancy of RAIDZ2. Using the NVMe as an L2ARC seems likely to wear it out faster than forcing reads to come from the SSD and writes to go to disk. As I understand it, nothing can appear in the L2ARC except by being in the ARC first. According to Lucas and Jude, at the time of writing (ca 2016), the L2ARC index does not get saved across a reboot. If that has changed so that all the underlying filesystem is fully cached in the SSD if the L2ARC is larger than the filesystem, that seems the best route. Otherwise reboots may cause significant wear. If an SSD and a disk form a mirror, which will satisfy the reads and at what speed? Can one half of a mirror be a RAIDZ2 filesystem? Reg ------------------------------------------ illumos: illumos-discuss Permalink: https://illumos.topicbox.com/groups/discuss/T9dbd246b28a51627-M0c4efd8a23cc1d35f4e22551 Delivery options: https://illumos.topicbox.com/groups/discuss/subscription
