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Seung Won Yoo

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DJFS : Directory-Granularity Filesystem Journaling for CMM-H SSDsFAST '252025-02-25
DJFS implements per-directory transactions for CXL.ME (CMH) SSDs, using path-based transaction selection, transaction coalescing, and transaction conflict…
Talk
OPIMQ: Order Preserving IO stack for Multi-Queue Block DeviceFAST '252025-02-25
OPIMQ enforces storage order across host and multi‑queue devices by tagging each IO with stream and app IDs and by four concrete mechanisms: Epoch Pinning…
Talk on
CJFS: Concurrent Journaling for Better ScalabilityFAST '23: 21st USENIX Conference on File and Storage Technologies2023-02-21
Extends EXT4 to allow concurrent journal commits by building a patched filesystem (CJFS) that implements Dual Thread Journaling, Multi-version Shadow Paging…
Talk
O-AFA:Order Preserving All Flash Array for Journaling Filesystem (Work-in-Progress Report)FAST '222022-02-22
Prototype order-preserving all-flash array firmware that tracks barrier flags per-LBA and groups writes into hash barrier stripes and cache barrier stripes…
Talk
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