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    LOG DESTAGING FROM FIXED-SIZE LOG PORTION
    1.
    发明申请
    LOG DESTAGING FROM FIXED-SIZE LOG PORTION 审中-公开

    公开(公告)号：US20200097566A1

    公开(公告)日：2020-03-26

    申请号：US16138103

    申请日：2018-09-21

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Cristian DIACONU ,  Naveen PRAKASH ,  Alejandro Hernandez SAENZ ,  Alexander BUDOVSKI

    IPC: G06F17/30 ,  G06F3/06

    Abstract: The bifurcation of a log into a fixed-size log portion and a growable log portion. Log records are first written to the fixed-size log portion. At some point, the older log records within the fixed-size log portion are destaged to the growable log portion. Destaging may involve copying the log records from the fixed-size log portion and tacking the log record onto the end of the growable log portion. This destaging might occur one sub-portion (e.g., one virtual log file) at a time. The more recent log records are within the fixed-size log portion. Accordingly, new writes to the log occur to the fixed-size log portion. Furthermore, a large portion of the reads are of the more recent log records within the fixed-size log portion. Thus, optimizing performance within the fixed-size log portion results in significant improvement in the performance of the overall log.

    BROKERING PERSISTED AND UNPERSISTED LOG RECORDS
    2.
    发明申请
    BROKERING PERSISTED AND UNPERSISTED LOG RECORDS 审中-公开

    公开(公告)号：US20200097578A1

    公开(公告)日：2020-03-26

    申请号：US16138238

    申请日：2018-09-21

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Cristian DIACONU ,  Naveen PRAKASH ,  Alexander BUDOVSKI ,  Huanhui HU ,  Alejandro Hernandez SAENZ

    IPC: G06F17/30

    Abstract: Brokering log records so as to prevent log records that are not yet persisted in a persistent log from being disseminated. The log records may be generated as a primary compute system performs operations. Upon receiving a request for a log record, the broker component determines whether the requested log record has been persisted in a persistent log. If the broker component determines that the log record has been persisted in the persistent log, the broker component responds to the request by causing the requested log record to be provided to the requesting entity (e.g., a secondary compute system). On the other hand, if the log record cannot yet determine that the log record has been persisted in the persistent log, the broker component prevents the log record from being provided to the requesting entity. This prevents data from being inconsistent during recovery.

    MOUNTING A DRIVE TO MULTIPLE COMPUTING SYSTEMS
    9.
    发明申请
    MOUNTING A DRIVE TO MULTIPLE COMPUTING SYSTEMS 审中-公开

    公开(公告)号：US20200097172A1

    公开(公告)日：2020-03-26

    申请号：US16138139

    申请日：2018-09-21

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Cristian DIACONU ,  Alejandro Hernandez SAENZ ,  Naveen PRAKASH ,  Alexander BUDOVSKI

    IPC: G06F3/06 ,  G06F11/20

    Abstract: The mounting a drive to two or more computing systems. For instance, the drive may be mounted to a first computing system so as to be writable (and potentially readable) by the first computing system. But also, the drive is also mounted to one or more other computing systems so as to be only readable by those one or more computing systems. This allows for multiple computing systems to have access to the drive without risk that the data thereon will become corrupt. In one embodiment, the only user data stored on that drive is a single file of fixed size. Thus, even when user data is written into the fixed-size file, the management data stored (that keeps track of the files) on the drive does not change.

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