Dgraph v1.2.6-rc2

Changed

• Update Badger. (#5940, #5990)
  • Fix assert in background compression and encryption. (dgraph-io/badger#1366)
  • Avoid panic in filltables() (dgraph-io/badger#1365)
  • Force KeepL0InMemory to be true when InMemory is true (dgraph-io/badger#1375)
  • Tests: Use t.Parallel in TestIteratePrefix tests (dgraph-io/badger#1377)
  • Remove second initialization of writech in Open (dgraph-io/badger#1382)
  • Increase default valueThreshold from 32B to 1KB (dgraph-io/badger#1346)
  • Pre allocate cache key for the block cache and the bloom filter cache (dgraph-io/badger#1371)
  • Rework DB.DropPrefix (dgraph-io/badger#1381)
  • Update head while replaying value log (dgraph-io/badger#1372)
  • Update ristretto to commit f66de99 (dgraph-io/badger#1391)
  • Enable cross-compiled 32bit tests on TravisCI (dgraph-io/badger#1392)
  • Avoid panic on multiple closer.Signal calls (dgraph-io/badger#1401)
  • Add a contribution guide (dgraph-io/badger#1379)
  • Add assert to check integer overflow for table size (dgraph-io/badger#1402)
  • Return error if the vlog writes exceeds more that 4GB. (dgraph-io/badger#1400)
  • Revert "add assert to check integer overflow for table size (dgraph-io/badger#1402)" (dgraph-io/badger#1406)
  • Revert "fix: Fix race condition in block.incRef (dgraph-io/badger#1337)" (dgraph-io/badger#1407)
  • Revert "Buffer pool for decompression (dgraph-io/badger#1308)" (dgraph-io/badger#1408)
  • Revert "Compress/Encrypt Blocks in the background (dgraph-io/badger#1227)" (dgraph-io/badger#1409)
  • Add missing changelog for v2.0.3 (dgraph-io/badger#1410)
  • Changelog for v20.07.0 (dgraph-io/badger#1411)

Fixed

• Alpha: Enable bloom filter caching. (#5554)
• K shortest paths queries fix. (#5596)
• Add check on rebalance interval. (#5595)
• Change error message in case of successful license application. (#5593)
• Remove noisy logs in tablet move. (#5592)
• Avoid assigning duplicate RAFT IDs to new nodes. Fixes #5436. (#5603)
• Update badger: Set KeepL0InMemory to false (badger default), and Set DetectConflicts to false. (#5615)
• Use /tmp dir to store temporary index. Fixes #4600. (#5730)
• Split posting lists recursively. (#4867)
• Set version when rollup is called with no splits. (#4945)
• Return error instead of panic (readPostingList). Fixes #5749. (#5908)
• ServeTask: Return error if server is not ready. (#6022)
• Enterprise features
  • Backup: Change groupId from int to uint32. (#5613)
  • Backup: During backup, collapse split posting lists into a single list. (#4682)
  • Backup: Use a sync.Pool to allocate KVs during backup. (#5579)