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Chris LuandGitHub
fee3fcb55a
df on a mount shows the space the cluster gives up to the data: every replica of a regular volume, every shard of an ec one. That is the honest answer for capacity planning, but it is not the question a user asks when they want to know how much of their data is stored. Add -df.logical. The master reports the logical sizes alongside the raw ones: one replica per regular volume, the data shards of each ec volume counted once. Free space is divided by the copies the requested replication makes, so used plus available stays the amount of data the mount can still write, and it comes off the cluster-wide usage rather than one collection's, since capacity is cluster-wide too. Statistics through a filer resolves an unset replication to the filer's default rather than the master's, matching where the writes it is sizing for actually land. The flag governs the quota check too, so a mount has one notion of how much it is using. A filer that predates the new fields sends zeros, and the mount keeps reporting the raw sizes.
32 lines
856 B
Go
32 lines
856 B
Go
package mount
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import "testing"
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func TestDiskSizes(t *testing.T) {
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wfs := &WFS{option: &Option{}}
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wfs.stats.TotalSize = 3000
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wfs.stats.UsedSize = 2000
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wfs.stats.LogicalTotalSize = 1500
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wfs.stats.LogicalUsedSize = 1000
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total, used := wfs.diskSizes()
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if total != 3000 || used != 2000 {
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t.Errorf("raw sizes: got %d/%d, want 3000/2000", total, used)
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}
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wfs.option.LogicalDiskUsage = true
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total, used = wfs.diskSizes()
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if total != 1500 || used != 1000 {
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t.Errorf("logical sizes: got %d/%d, want 1500/1000", total, used)
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}
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// a filer that does not report logical sizes must not read as an empty
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// filesystem
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wfs.stats.LogicalTotalSize = 0
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wfs.stats.LogicalUsedSize = 0
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total, used = wfs.diskSizes()
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if total != 3000 || used != 2000 {
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t.Errorf("sizes from a filer without logical support: got %d/%d, want 3000/2000", total, used)
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}
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}
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