shouldPullMounts []string
shouldTrashMounts []string
+
+ expectResult balanceResult
}
func (bal *balancerSuite) SetUpSuite(c *check.C) {
}
bal.MinMtime = time.Now().UnixNano() - bal.signatureTTL*1e9
+ bal.cleanupMounts()
}
func (bal *balancerSuite) TestPerfect(c *check.C) {
shouldTrash: slots{2}})
}
+func (bal *balancerSuite) TestCleanupMounts(c *check.C) {
+ bal.srvs[3].mounts[0].KeepMount.ReadOnly = true
+ bal.srvs[3].mounts[0].KeepMount.DeviceID = "abcdef"
+ bal.srvs[14].mounts[0].KeepMount.DeviceID = "abcdef"
+ c.Check(len(bal.srvs[3].mounts), check.Equals, 1)
+ bal.cleanupMounts()
+ c.Check(len(bal.srvs[3].mounts), check.Equals, 0)
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{1},
+ shouldPull: slots{2}})
+}
+
+func (bal *balancerSuite) TestVolumeReplication(c *check.C) {
+ bal.srvs[0].mounts[0].KeepMount.Replication = 2 // srv 0
+ bal.srvs[14].mounts[0].KeepMount.Replication = 2 // srv e
+ bal.cleanupMounts()
+ // block 0 rendezvous is 3,e,a -- so slot 1 has repl=2
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{1},
+ shouldPull: slots{0}})
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1},
+ shouldPull: nil})
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 2},
+ shouldTrash: slots{2}})
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 3},
+ current: slots{0, 2, 3, 4},
+ shouldPull: slots{1},
+ shouldTrash: slots{4},
+ expectResult: balanceResult{
+ have: 4,
+ want: 3,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 3,
+ surplus: 1,
+ unachievable: false}}}})
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 3},
+ current: slots{0, 1, 2, 3, 4},
+ shouldTrash: slots{2, 3, 4}})
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 4},
+ current: slots{0, 1, 2, 3, 4},
+ shouldTrash: slots{3, 4},
+ expectResult: balanceResult{
+ have: 6,
+ want: 4,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 4,
+ surplus: 2,
+ unachievable: false}}}})
+ // block 1 rendezvous is 0,9,7 -- so slot 0 has repl=2
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 2},
+ current: slots{0},
+ expectResult: balanceResult{
+ have: 2,
+ want: 2,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 2,
+ surplus: 0,
+ unachievable: false}}}})
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 3},
+ current: slots{0},
+ shouldPull: slots{1}})
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 4},
+ current: slots{0},
+ shouldPull: slots{1, 2}})
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 4},
+ current: slots{2},
+ shouldPull: slots{0, 1}})
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 4},
+ current: slots{7},
+ shouldPull: slots{0, 1, 2},
+ expectResult: balanceResult{
+ have: 1,
+ want: 4,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 4,
+ surplus: -3,
+ unachievable: false}}}})
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 2},
+ current: slots{1, 2, 3, 4},
+ shouldPull: slots{0},
+ shouldTrash: slots{3, 4}})
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 2},
+ shouldTrash: slots{1, 2},
+ expectResult: balanceResult{
+ have: 4,
+ want: 2,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 2,
+ surplus: 2,
+ unachievable: false}}}})
+}
+
+func (bal *balancerSuite) TestDeviceRWMountedByMultipleServers(c *check.C) {
+ bal.srvs[0].mounts[0].KeepMount.DeviceID = "abcdef"
+ bal.srvs[9].mounts[0].KeepMount.DeviceID = "abcdef"
+ bal.srvs[14].mounts[0].KeepMount.DeviceID = "abcdef"
+ // block 0 belongs on servers 3 and e, which have different
+ // device IDs.
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{1},
+ shouldPull: slots{0}})
+ // block 1 belongs on servers 0 and 9, which both report
+ // having a replica, but the replicas are on the same device
+ // ID -- so we should pull to the third position (7).
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1},
+ shouldPull: slots{2}})
+ // block 1 can be pulled to the doubly-mounted device, but the
+ // pull should only be done on the first of the two servers.
+ bal.try(c, tester{
+ known: 1,
+ desired: map[string]int{"default": 2},
+ current: slots{2},
+ shouldPull: slots{0}})
+ // block 0 has one replica on a single device mounted on two
+ // servers (e,9 at positions 1,9). Trashing the replica on 9
+ // would lose the block.
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{1, 9},
+ shouldPull: slots{0},
+ expectResult: balanceResult{
+ have: 1,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 2,
+ surplus: -1,
+ unachievable: false}}}})
+ // block 0 is overreplicated, but the second and third
+ // replicas are the same replica according to DeviceID
+ // (despite different Mtimes). Don't trash the third replica.
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 9},
+ expectResult: balanceResult{
+ have: 2,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 2,
+ surplus: 0,
+ unachievable: false}}}})
+ // block 0 is overreplicated; the third and fifth replicas are
+ // extra, but the fourth is another view of the second and
+ // shouldn't be trashed.
+ bal.try(c, tester{
+ known: 0,
+ desired: map[string]int{"default": 2},
+ current: slots{0, 1, 5, 9, 12},
+ shouldTrash: slots{5, 12},
+ expectResult: balanceResult{
+ have: 4,
+ classState: map[string]balancedBlockState{"default": {
+ desired: 2,
+ surplus: 2,
+ unachievable: false}}}})
+}
+
func (bal *balancerSuite) TestChangeStorageClasses(c *check.C) {
// For known blocks 0/1/2/3, server 9 is slot 9/1/14/0 in
// probe order. For these tests we give it two mounts, one
for _, srv := range bal.srvs {
srv.ChangeSet = &ChangeSet{}
}
- bal.balanceBlock(knownBlkid(t.known), blk)
+ result := bal.balanceBlock(knownBlkid(t.known), blk)
var didPull, didTrash slots
var didPullMounts, didTrashMounts []string
sort.Strings(didTrashMounts)
c.Check(didTrashMounts, check.DeepEquals, t.shouldTrashMounts)
}
+ if t.expectResult.have > 0 {
+ c.Check(result.have, check.Equals, t.expectResult.have)
+ }
+ if t.expectResult.want > 0 {
+ c.Check(result.want, check.Equals, t.expectResult.want)
+ }
+ if t.expectResult.classState != nil {
+ c.Check(result.classState, check.DeepEquals, t.expectResult.classState)
+ }
}
// srvList returns the KeepServices, sorted in rendezvous order and
projects / arvados.git / blobdiff