add garbage collection for ZenFS #87
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This PR adds GC for ZNS. Here's how it works: * We use the statistics interface added in bzbd/zenfs#6, where we can get what size each file occupies in each zone. * We spawn a ZNSGC task in the background, which works like TTLGC. It polls statistics from ZenFS every 10s. * The task will find all full zones with 50% garbage (by default) and mark files in that zone for GC. Along with ZNS GC, other features are added. * We added `zenfs_gc_ratio` option in db_bench command. * We fixed a bug where files may be deleted before closed. Signed-off-by: Alex Chi <iskyzh@gmail.com>
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ping @levisonchen @mm304321141 for review |
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
Signed-off-by: Alex Chi <iskyzh@gmail.com>
mm304321141
approved these changes
Jul 21, 2021
Signed-off-by: Alex Chi <iskyzh@gmail.com>
mm304321141
approved these changes
Jul 21, 2021
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This PR adds GC for ZNS. Here's how it works:
Along with ZNS GC, other features are added.
zenfs_gc_ratiooption in db_bench command.Signed-off-by: Alex Chi iskyzh@gmail.com