From: "Fabian Grünbichler" <f.gruenbichler@proxmox.com>
To: Proxmox Backup Server development discussion
<pbs-devel@lists.proxmox.com>
Subject: Re: [pbs-devel] [PATCH v3 proxmox-backup 37/58] client: pxar: helper for lookup of reusable dynamic entries
Date: Thu, 04 Apr 2024 14:54:53 +0200 [thread overview]
Message-ID: <1712231610.9nc2oh19ik.astroid@yuna.none> (raw)
In-Reply-To: <20240328123707.336951-38-c.ebner@proxmox.com>
On March 28, 2024 1:36 pm, Christian Ebner wrote:
> The helper method allows to lookup the entries of a dynamic index
> which fully cover a given offset range. Further, the helper returns
> the start padding from the start offset of the dynamic index entry
> to the start offset of the given range and the end padding.
>
> This will be used to lookup size and digest for chunks covering the
> payload range of a regular file in order to re-use found chunks by
> indexing them in the archives index file instead of re-encoding the
> payload.
>
> Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
> ---
> changes since version 2:
> - moved this from the dynamic index to the pxar create as suggested
> - refactored and optimized search, going for linear search to find the
> end entry
> - reworded commit message
>
> pbs-client/src/pxar/create.rs | 63 +++++++++++++++++++++++++++++++++++
> 1 file changed, 63 insertions(+)
>
> diff --git a/pbs-client/src/pxar/create.rs b/pbs-client/src/pxar/create.rs
> index 2bb5a6253..e2d3954ca 100644
> --- a/pbs-client/src/pxar/create.rs
> +++ b/pbs-client/src/pxar/create.rs
> @@ -2,6 +2,7 @@ use std::collections::{HashMap, HashSet};
> use std::ffi::{CStr, CString, OsStr};
> use std::fmt;
> use std::io::{self, Read};
> +use std::ops::Range;
> use std::os::unix::ffi::OsStrExt;
> use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, OwnedFd, RawFd};
> use std::path::{Path, PathBuf};
> @@ -16,6 +17,7 @@ use nix::fcntl::OFlag;
> use nix::sys::stat::{FileStat, Mode};
>
> use pathpatterns::{MatchEntry, MatchFlag, MatchList, MatchType, PatternFlag};
> +use pbs_datastore::index::IndexFile;
> use proxmox_sys::error::SysError;
> use pxar::encoder::{LinkOffset, SeqWrite};
> use pxar::Metadata;
> @@ -25,6 +27,7 @@ use proxmox_lang::c_str;
> use proxmox_sys::fs::{self, acl, xattr};
>
> use pbs_datastore::catalog::BackupCatalogWriter;
> +use pbs_datastore::dynamic_index::DynamicIndexReader;
>
> use crate::pxar::metadata::errno_is_unsupported;
> use crate::pxar::tools::assert_single_path_component;
> @@ -791,6 +794,66 @@ impl Archiver {
> }
> }
>
> +/// Dynamic Entry reusable by payload references
> +#[derive(Clone, Debug)]
> +#[repr(C)]
> +pub struct ReusableDynamicEntry {
> + size_le: u64,
> + digest: [u8; 32],
> +}
> +
> +impl ReusableDynamicEntry {
> + #[inline]
> + pub fn size(&self) -> u64 {
> + u64::from_le(self.size_le)
> + }
> +
> + #[inline]
> + pub fn digest(&self) -> [u8; 32] {
> + self.digest
> + }
> +}
> +
> +/// List of dynamic entries containing the data given by an offset range
> +fn lookup_dynamic_entries(
> + index: &DynamicIndexReader,
> + range: Range<u64>,
> +) -> Result<(Vec<ReusableDynamicEntry>, u64, u64), Error> {
> + let end_idx = index.index_count() - 1;
> + let chunk_end = index.chunk_end(end_idx);
> + let start = index.binary_search(0, 0, end_idx, chunk_end, range.start)?;
> + let mut end = start;
> + while end < end_idx {
> + if range.end < index.chunk_end(end) {
> + break;
> + }
> + end += 1;
> + }
this loop here
> +
> + let offset_first = if start == 0 {
> + 0
> + } else {
> + index.chunk_end(start - 1)
> + };
offset_first is prev_end, so maybe we could just name it like that from
the start?
> +
> + let padding_start = range.start - offset_first;
> + let padding_end = index.chunk_end(end) - range.end;
> +
> + let mut indices = Vec::new();
> + let mut prev_end = offset_first;
> + for dynamic_entry in &index.index()[start..end + 1] {
> + let size = dynamic_entry.end() - prev_end;
> + let reusable_dynamic_entry = ReusableDynamicEntry {
> + size_le: size.to_le(),
> + digest: dynamic_entry.digest(),
> + };
> + prev_end += size;
> + indices.push(reusable_dynamic_entry);
> + }
and this one here could probably be combined?
> +
> + Ok((indices, padding_start, padding_end))
> +}
e.g., the whole thing could become something like (untested ;)):
let end_idx = index.index_count() - 1;
let chunk_end = index.chunk_end(end_idx);
let start = index.binary_search(0, 0, end_idx, chunk_end, range.start)?;
let mut prev_end = if start == 0 {
0
} else {
index.chunk_end(start - 1)
};
let padding_start = range.start - prev_end;
let mut padding_end = 0;
let mut indices = Vec::new();
for dynamic_entry in &index.index()[start..] {
let end = dynamic_entry.end();
if range.end < end {
padding_end = end - range.end;
break;
}
let reusable_dynamic_entry = ReusableDynamicEntry {
size_le: (end - prev_end).to_le(),
digest: dynamic_entry.digest(),
};
indices.push(reusable_dynamic_entry);
prev_end = end;
}
Ok((indices, padding_start, padding_end))
> +
> fn get_metadata(
> fd: RawFd,
> stat: &FileStat,
> --
> 2.39.2
>
>
>
> _______________________________________________
> pbs-devel mailing list
> pbs-devel@lists.proxmox.com
> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pbs-devel
>
>
>
next prev parent reply other threads:[~2024-04-04 12:55 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-28 12:36 [pbs-devel] [PATCH v3 pxar proxmox-backup 00/58] fix #3174: improve file-level backup Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 01/58] encoder: fix two typos in comments Christian Ebner
2024-04-03 9:12 ` [pbs-devel] applied: " Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 02/58] format/examples: add PXAR_PAYLOAD_REF entry header Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 03/58] decoder: add method to read payload references Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 04/58] decoder: factor out skip part from skip_entry Christian Ebner
2024-04-03 9:18 ` Fabian Grünbichler
2024-04-03 11:02 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 05/58] encoder: add optional output writer for file payloads Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 06/58] encoder: move to stack based state tracking Christian Ebner
2024-04-03 9:54 ` Fabian Grünbichler
2024-04-03 11:01 ` Christian Ebner
2024-04-04 8:48 ` Fabian Grünbichler
2024-04-04 9:04 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 07/58] decoder/accessor: add optional payload input stream Christian Ebner
2024-04-03 10:38 ` Fabian Grünbichler
2024-04-03 11:47 ` Christian Ebner
2024-04-03 12:18 ` Christian Ebner
2024-04-04 8:46 ` Fabian Grünbichler
2024-04-04 9:49 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 08/58] encoder: add payload reference capability Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 09/58] encoder: add payload position capability Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 10/58] encoder: add payload advance capability Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 11/58] encoder/format: finish payload stream with marker Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 12/58] format: add payload stream start marker Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 13/58] format: add pxar format version entry Christian Ebner
2024-04-03 11:41 ` Fabian Grünbichler
2024-04-03 13:31 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 pxar 14/58] format/encoder/decoder: add entry type cli params Christian Ebner
2024-04-03 12:01 ` Fabian Grünbichler
2024-04-03 14:41 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 15/58] client: pxar: switch to stack based encoder state Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 16/58] client: backup writer: only borrow http client Christian Ebner
2024-04-08 9:04 ` [pbs-devel] applied: " Fabian Grünbichler
2024-04-08 9:17 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 17/58] client: backup: factor out extension from backup target Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 18/58] client: backup: early check for fixed index type Christian Ebner
2024-04-08 9:05 ` [pbs-devel] applied: " Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 19/58] client: pxar: combine writer params into struct Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 20/58] client: backup: split payload to dedicated stream Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 21/58] client: helper: add helpers for creating reader instances Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 22/58] client: helper: add method for split archive name mapping Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 23/58] client: restore: read payload from dedicated index Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 24/58] tools: cover meta extension for pxar archives Christian Ebner
2024-04-04 9:01 ` Fabian Grünbichler
2024-04-04 9:06 ` Christian Ebner
2024-04-04 9:10 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 25/58] restore: " Christian Ebner
2024-04-04 9:02 ` Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 26/58] client: mount: make split pxar archives mountable Christian Ebner
2024-04-04 9:43 ` Fabian Grünbichler
2024-04-04 13:29 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 27/58] api: datastore: refactor getting local chunk reader Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 28/58] api: datastore: attach optional payload " Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 29/58] catalog: shell: factor out pxar fuse reader instantiation Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 30/58] catalog: shell: redirect payload reader for split streams Christian Ebner
2024-04-04 9:49 ` Fabian Grünbichler
2024-04-04 15:52 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 31/58] www: cover meta extension for pxar archives Christian Ebner
2024-04-04 10:01 ` Fabian Grünbichler
2024-04-04 14:51 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 32/58] pxar: add optional payload input for achive restore Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 33/58] pxar: add more context to extraction error Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 34/58] client: pxar: include payload offset in output Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 35/58] pxar: show padding in debug output on archive list Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 36/58] datastore: dynamic index: add method to get digest Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 37/58] client: pxar: helper for lookup of reusable dynamic entries Christian Ebner
2024-04-04 12:54 ` Fabian Grünbichler [this message]
2024-04-04 17:13 ` Christian Ebner
2024-04-05 7:22 ` Christian Ebner
2024-04-05 11:28 ` Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 38/58] upload stream: impl reused chunk injector Christian Ebner
2024-04-04 14:24 ` Fabian Grünbichler
2024-04-05 10:26 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 39/58] client: chunk stream: add struct to hold injection state Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 40/58] client: chunk stream: add dynamic entries injection queues Christian Ebner
2024-04-04 14:52 ` Fabian Grünbichler
2024-04-08 13:54 ` Christian Ebner
2024-04-09 7:19 ` Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 41/58] specs: add backup detection mode specification Christian Ebner
2024-04-04 14:54 ` Fabian Grünbichler
2024-04-08 13:36 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 42/58] client: implement prepare reference method Christian Ebner
2024-04-05 8:01 ` Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 43/58] client: pxar: implement store to insert chunks on caching Christian Ebner
2024-04-05 7:52 ` Fabian Grünbichler
2024-04-09 9:12 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 44/58] client: pxar: add previous reference to archiver Christian Ebner
2024-04-04 15:04 ` Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 45/58] client: pxar: add method for metadata comparison Christian Ebner
2024-04-05 8:08 ` Fabian Grünbichler
2024-04-05 8:14 ` Christian Ebner
2024-04-09 12:52 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 46/58] pxar: caching: add look-ahead cache types Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 47/58] client: pxar: add look-ahead caching Christian Ebner
2024-04-05 8:33 ` Fabian Grünbichler
2024-04-09 14:53 ` Christian Ebner
[not found] ` <<dce38c53-f3e7-47ac-b1fd-a63daaabbcec@proxmox.com>
2024-04-10 7:03 ` Fabian Grünbichler
2024-04-10 7:11 ` Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 48/58] fix #3174: client: pxar: enable caching and meta comparison Christian Ebner
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 49/58] client: backup: increase average chunk size for metadata Christian Ebner
2024-04-05 9:42 ` Fabian Grünbichler
2024-04-05 10:49 ` Dietmar Maurer
2024-04-08 8:28 ` Fabian Grünbichler
2024-03-28 12:36 ` [pbs-devel] [PATCH v3 proxmox-backup 50/58] client: backup writer: add injected chunk count to stats Christian Ebner
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 51/58] pxar: create: show chunk injection stats debug output Christian Ebner
2024-04-05 9:47 ` Fabian Grünbichler
2024-04-10 10:00 ` Christian Ebner
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 52/58] client: pxar: add entry kind format version Christian Ebner
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 53/58] client: pxar: opt encode cli exclude patterns as CliParams Christian Ebner
2024-04-05 9:49 ` Fabian Grünbichler
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 54/58] client: pxar: add flow chart for metadata change detection Christian Ebner
2024-04-05 10:16 ` Fabian Grünbichler
2024-04-10 10:04 ` Christian Ebner
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 55/58] docs: describe file format for split payload files Christian Ebner
2024-04-05 10:26 ` Fabian Grünbichler
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 56/58] docs: add section describing change detection mode Christian Ebner
2024-04-05 11:22 ` Fabian Grünbichler
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 57/58] test-suite: add detection mode change benchmark Christian Ebner
2024-03-28 12:37 ` [pbs-devel] [PATCH v3 proxmox-backup 58/58] test-suite: add bin to deb, add shell completions Christian Ebner
2024-04-05 11:39 ` [pbs-devel] [PATCH v3 pxar proxmox-backup 00/58] fix #3174: improve file-level backup Fabian Grünbichler
2024-04-29 12:13 ` Christian Ebner
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