JuiceFS v1.0.0-beta2 is the second beta release for v1.0. It has 150+ commits from 16 contributors, thanks to @SandyXSD @zhijian-pro @yuhr123 @xiaogaozi @davies @sanwan @AIXjing @Suave @tangyoupeng @zwwhdls @201341 @zhexuany @chnliyong @liufuyang @rayw000 @fredchen2022 !

New

• Supports [BadgerDB](https://dgraph.io/docs/badger/) (an embeddable key-value database) as metadata engine (#1340)
• Supports [WebDAV](https://en.wikipedia.org/wiki/WebDAV) protocol to access JuiceFS files (#1444)
• Supports read-only clients connecting to a Redis Sentinel-controlled replica (#1433)
• Added version control of metadata and clients (#1469)
• Added categories and long descriptions for all commands (#1488, #1493)
• Added a new option no-bgjob for service commands to disable background jobs like clean-up, backup, etc. (#1472)
• Added metrics for number of rawstaging blocks (#1341)
• Added cross-platform compile script (#1374)

Changed

• cmd: help command is removed; use --help/-h flag to get help information (#1488)
• cmd: print usage if not enough args (#1491)
• cmd/format: only try to create bucket when it really doesn't exist (#1289)
• cmd/format: prevend reusing object storage when formating a volume (#1420, #1449)
• cmd/destroy: show information of active sessions (#1377)
• cmd/config: add sanity check of new values (#1479)
• cmd/umount: ignore error from umount (#1425)
• meta: add progress bar for CompactAll (#1317)
• meta: hide password in meta-url (#1333, #1361)
• meta: use META_PASSWORD env and omit unnecessary characters (#1388)
• meta: limit the number when scanning sessions/files (#1397)
• meta: limit the number of clients running background cleanup jobs (#1393)
• meta: continue dump when encountering non-fatal errors (#1462)
• meta/sql: increase max idle connections to CPU*2 for SQL engine (#1443)
• object: set ContentType when putting object (#1468)
• object: support skip https certificate verify (#1453)
• object/s3: format support pvc link (#1382)
• object/qingstor: support private cloud and replace the sdk repository (#1303)
• vfs: don't do backup for read-only clients (#1435)
• vfs: add BackupMeta in config (#1460)
• utils: log now contains the exact line of caller, and is colorized in terminal (#1404, #1318, #1312)
• utils: simplify the usage of progress bar (#1325)
• utils: add SleepWithJitter to reduce collision of background jobs (#1412)
• SDK: upgrade Hadoop common to 3.1.4 (#1411)
• SDK: java sdk push gateway support multiple volumes (#1492)
• Other: update chart move it to a standalone repository (#1281, #1336, #1348)
• Improves documentation and coverage of tests

Bugfix

• cmd: fix buffer-size in gc and fsck (#1316)
• cmd/bench: convert PATH to absolute path (#1305)
• meta: return EROFS as soon as possible (#1477)
• meta/redis: fix leaked inodes in Redis (#1353)
• meta/tkv: fix divide by zero error when dumping meta (#1369)
• meta/tikv: fix scan of tikv, limiting the upperbound (#1455)
• meta/memkv: fix scanKeys, returning a sorted list (#1381)
• meta/sql: delete warning message for empty directory (#1442)
• meta/sql: fix return value of mustInsert (#1429)
• vfs: fixed deadlock when truncate a released file handle. (#1383)
• vfs/trash: fix access to trash dir (#1356)
• vfs/backup: skip dir objects when scanning meta backups (#1370)
• vfs/backup: fix incorrect inode number when using subdir (#1385)
• utils: fix the contention between progress bar and logger (#1436)
• Windows: fix rename fails because the chunk file is still open (#1315)
• Windows: fix mkdir on windows platform (#1327)
• SDK: hadoop: fix umask apply (#1338, #1394)
• SDK: hadoop: fix libjfs.so load bug (#1458)
• other: fix legend of "Operations" panel in Grafana template (#1321)