+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}}}})
+}
+