| - term: entry |
| d: An entry is a sequence of bytes (plus some metadata) written to a BookKeeper ledger. Entries are also known as records. |
| - term: ledger |
| d: A ledger is a sequence of entries written to BookKeeper. Entries are written sequentially to ledgers and at most once, giving ledgers append-only semantics. |
| - term: bookie |
| d: | |
| A bookie is an individual BookKeeper storage server. |
| |
| Bookies store the content of ledgers and act as a distributed ensemble. |
| - term: rereplication |
| d: A subsystem that runs in the background on bookies to ensure that ledgers are fully replicated even if one bookie from the ensemble is down. |
| - term: striping |
| d: | |
| Striping is the process of distributing BookKeeper ledgers to sub-groups of bookies rather than to all bookies in a BookKeeper ensemble. |
| |
| Striping is essential to ensuring fast performance. |
| - term: striped |
| d: | |
| Striping is the process of distributing BookKeeper ledgers to sub-groups of bookies rather than to all bookies in a BookKeeper ensemble. |
| |
| Striping is essential to ensuring fast performance. |
| - term: journal |
| d: A journal file stores BookKeeper transaction logs. |
| - term: fencing |
| d: When a reader forces a ledger to close, preventing any further entries from being written to the ledger. |
| - term: record |
| d: A record is a sequence of bytes (plus some metadata) written to a BookKeeper ledger. Records are also known as entries. |
