Logical Synchronous Replication in the Tintri VMstore File System


Gideon Glass, Arjun Gopalan, Dattatraya Koujalagi, Abhinand Palicherla, and Sumedh Sakdeo, Tintri, Inc


A standard feature of enterprise data storage systems is synchronous replication: updates received from clients by one storage system are replicated to a remote storage system and are only acknowledged to clients after having been stored persistently on both storage systems. Traditionally these replication schemes require configuration on a coarse granularity, e.g. on a LUN, filesystem volume, or whole-system basis. In contrast to this, we present a new architecture which operates on a fine granularity---individual files and directories. To implement this, we use a combination of novel per-file capabilities and existing techniques to solve the following problems: tracking parallel writes in flight on independent storage systems; replicating arbitrary filesystem operations; efficiently resynchronizing after a disconnect; and verifying the integrity of replicated data between two storage systems.

Open Access Media

USENIX is committed to Open Access to the research presented at our events. Papers and proceedings are freely available to everyone once the event begins. Any video, audio, and/or slides that are posted after the event are also free and open to everyone. Support USENIX and our commitment to Open Access.

@inproceedings {210506,
author = {Gideon Glass and Arjun Gopalan and Dattatraya Koujalagi and Abhinand Palicherla and Sumedh Sakdeo},
title = {Logical Synchronous Replication in the Tintri VMstore File System},
booktitle = {16th {USENIX} Conference on File and Storage Technologies ({FAST} 18)},
year = {2018},
isbn = {978-1-931971-42-3},
address = {Oakland, CA},
pages = {295--308},
url = {https://www.usenix.org/conference/fast18/presentation/glass},
publisher = {{USENIX} Association},
month = feb,