From: Stefan Reiter <s.reiter@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH 0/3] Add cache for live-restore
Date: Wed, 28 Apr 2021 18:06:52 +0200 [thread overview]
Message-ID: <20210428160655.29941-1-s.reiter@proxmox.com> (raw)
Adds a mmap-backed buffer (as suggested by Dietmar to avoid memory starvation)
of 64+256 MiB for accessing chunks from PBS. Helps to accelerate live-restore.
Quantitative benchmarking appears really hard, variance between live-restore
runs is really high for some reason (both time-to-desktop and time-to-finish).
On average it seems to be between equal and up to 30% faster - again, with a lot
of variance between runs.
In testing with a Windows VM I saw cache hit rates of about 25% or higher, so
the cache is certainly used, but there seem to be too many other factors in
play...
proxmox-backup: Stefan Reiter (2):
tools: add mmap_buffer module
RemoteChunkReader: add LRU cached variant
src/bin/proxmox_backup_client/mount.rs | 12 ++-
src/client/remote_chunk_reader.rs | 110 ++++++++++++++++++++----
src/tools.rs | 1 +
src/tools/mmap_buffer.rs | 113 +++++++++++++++++++++++++
4 files changed, 218 insertions(+), 18 deletions(-)
create mode 100644 src/tools/mmap_buffer.rs
proxmox-backup-qemu: Stefan Reiter (1):
access: use bigger cache and LRU chunk reader
src/restore.rs | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
--
2.20.1
next reply other threads:[~2021-04-28 16:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-28 16:06 Stefan Reiter [this message]
2021-04-28 16:06 ` [pbs-devel] [PATCH proxmox-backup 1/3] tools: add mmap_buffer module Stefan Reiter
2021-04-28 16:06 ` [pbs-devel] [PATCH proxmox-backup 2/3] RemoteChunkReader: add LRU cached variant Stefan Reiter
2021-04-28 16:06 ` [pbs-devel] [PATCH proxmox-backup-qemu 3/3] access: use bigger cache and LRU chunk reader Stefan Reiter
2021-04-28 16:14 [pbs-devel] [PATCH 0/3] Add cache for live-restore Dietmar Maurer
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