Abstract: An example includes receiving a read request specifying a target range and a target checkpoint, and executing a first query to retrieve a first entry of a metadata table. The first entry is a most recent entry of those entries that are older than the target checkpoint and record write ranges overlapping the target range. The example also includes, if the write range in the first entry does not cover all of the target range, determining a remaining portion of the target range that excludes the write range in the first entry. The example also includes executing a second query to retrieve a second entry of the metadata table, where the second entry is a most recent record in a second subset of entries that are older that the target checkpoint and record write ranges overlapping the remaining portion of the target location range.

Abstract: An example includes receiving a read request specifying a target range and a target checkpoint, and executing a first query to retrieve a first entry of a metadata table. The first entry is a most recent entry of those entries that are older than the target checkpoint and record write ranges overlapping the target range. The example also includes, if the write range in the first entry does not cover all of the target range, determining a remaining portion of the target range that excludes the write range in the first entry. The example also includes executing a second query to retrieve a second entry of the metadata table, where the second entry is a most recent record in a second subset of entries that are older that the target checkpoint and record write ranges overlapping the remaining portion of the target location range.

Abstract: In some examples, a system monitors input/output (I/O) operations to identify data matching a honeypot pattern. The system determines storage location information associated with the data identified as matching the honeypot pattern, and detects an access of the data at a storage location indicated by the storage location information. The system indicates a potential attack based on detecting the access of the data at the storage location indicated by the storage location information.

Abstract: Example implementations relate to data storage. An example includes detecting a trigger event for a reduction operation of a journal log, and in response selecting a set of target segments in the journal log. The example also includes determining a set of storage locations that were modified by write operations recorded in the set of target segments, and identifying a subset of journal entries in the set of target segments, where each journal entry of the subset of journal entries records a most recent write operation recorded for a different storage location of the set of storage locations. The example also includes generating a new segment including the identified subset of journal entries, and replacing the set of target segments with the generated new segment.