frostfs-node/pkg/local_object_storage/blobstor/fstree
Roman Khimov fc31b9c947 [#970] fstree: Add linux-specific file writer using O_TMPFILE
O_TMPFILE is implemented for all modern FSes and it's much easier and safer to
use. If application crashes in the middle of writing this file would be gone
and won't leave any garbage.

Notice that this implementation makes a different choice wrt EEXIST handling,
generic one always overwrites, while this one keeps the old data.

There is no real performance difference.

SSD (slow&old), XFS, Core i7-8565U:

Sync
```
name                                  old time/op    new time/op    delta
Put/size=1024,thread=1/fstree-8         1.74ms ± 3%    0.06ms ± 7%  -96.31%  (p=0.000 n=10+10)
Put/size=1024,thread=20/fstree-8        10.0ms ±41%     1.1ms ±18%  -88.95%  (p=0.000 n=9+10)
Put/size=1024,thread=100/fstree-8       32.3ms ±60%     6.5ms ±14%  -79.97%  (p=0.000 n=10+10)
Put/size=1048576,thread=1/fstree-8      17.8ms ±90%     3.4ms ±70%  -81.08%  (p=0.000 n=10+10)
Put/size=1048576,thread=20/fstree-8     103ms ±174%    112ms ±158%     ~     (p=0.971 n=10+10)
Put/size=1048576,thread=100/fstree-8     949ms ±78%    583ms ±132%     ~     (p=0.089 n=10+10)

name                                  old alloc/op   new alloc/op   delta
Put/size=1024,thread=1/fstree-8         3.17kB ± 1%    1.96kB ± 0%  -38.09%  (p=0.000 n=10+10)
Put/size=1024,thread=20/fstree-8        59.6kB ± 1%    39.2kB ± 1%  -34.30%  (p=0.000 n=8+10)
Put/size=1024,thread=100/fstree-8        299kB ± 0%     198kB ± 0%  -33.90%  (p=0.000 n=7+9)
Put/size=1048576,thread=1/fstree-8      3.38kB ± 1%    2.36kB ± 1%  -30.22%  (p=0.000 n=10+10)
Put/size=1048576,thread=20/fstree-8     65.7kB ± 4%    47.7kB ± 6%  -27.27%  (p=0.000 n=10+10)
Put/size=1048576,thread=100/fstree-8     351kB ± 8%     245kB ± 8%  -30.22%  (p=0.000 n=10+10)

name                                  old allocs/op  new allocs/op  delta
Put/size=1024,thread=1/fstree-8           30.3 ± 2%      21.0 ± 0%  -30.69%  (p=0.000 n=10+10)
Put/size=1024,thread=20/fstree-8           554 ± 1%       413 ± 0%  -25.35%  (p=0.000 n=8+10)
Put/size=1024,thread=100/fstree-8        2.77k ± 0%     2.07k ± 0%  -25.27%  (p=0.000 n=7+10)
Put/size=1048576,thread=1/fstree-8        32.0 ± 0%      25.0 ± 0%  -21.88%  (p=0.000 n=9+8)
Put/size=1048576,thread=20/fstree-8        609 ± 5%       494 ± 6%  -18.93%  (p=0.000 n=10+10)
Put/size=1048576,thread=100/fstree-8     3.25k ± 9%     2.50k ± 8%  -23.21%  (p=0.000 n=10+10)
```

No sync
```
name                                  old time/op    new time/op    delta
Put/size=1024,thread=1/fstree-8         71.3µs ±10%    59.8µs ±10%  -16.21%  (p=0.000 n=10+10)
Put/size=1024,thread=20/fstree-8        1.43ms ± 6%    1.22ms ±13%  -14.53%  (p=0.000 n=10+10)
Put/size=1024,thread=100/fstree-8       8.12ms ± 3%    6.36ms ± 2%  -21.67%  (p=0.000 n=8+9)
Put/size=1048576,thread=1/fstree-8      1.88ms ±70%    1.61ms ±78%     ~     (p=0.393 n=10+10)
Put/size=1048576,thread=20/fstree-8     32.7ms ±28%   34.2ms ±112%     ~     (p=0.968 n=9+10)
Put/size=1048576,thread=100/fstree-8     262ms ±56%     226ms ±34%     ~     (p=0.447 n=10+9)

name                                  old alloc/op   new alloc/op   delta
Put/size=1024,thread=1/fstree-8         2.89kB ± 0%    1.96kB ± 0%  -32.28%  (p=0.000 n=10+10)
Put/size=1024,thread=20/fstree-8        58.2kB ± 0%    39.5kB ± 0%  -32.09%  (p=0.000 n=8+8)
Put/size=1024,thread=100/fstree-8        291kB ± 0%     198kB ± 0%  -32.19%  (p=0.000 n=9+9)
Put/size=1048576,thread=1/fstree-8      3.05kB ± 1%    2.13kB ± 1%  -30.16%  (p=0.000 n=10+9)
Put/size=1048576,thread=20/fstree-8     62.6kB ± 0%    44.3kB ± 0%  -29.23%  (p=0.000 n=9+9)
Put/size=1048576,thread=100/fstree-8     302kB ± 0%     210kB ± 1%  -30.39%  (p=0.000 n=9+9)

name                                  old allocs/op  new allocs/op  delta
Put/size=1024,thread=1/fstree-8           27.0 ± 0%      21.0 ± 0%  -22.22%  (p=0.000 n=10+10)
Put/size=1024,thread=20/fstree-8           539 ± 0%       415 ± 0%  -22.98%  (p=0.000 n=10+10)
Put/size=1024,thread=100/fstree-8        2.69k ± 0%     2.07k ± 0%  -23.09%  (p=0.000 n=9+9)
Put/size=1048576,thread=1/fstree-8        28.0 ± 0%      22.3 ± 3%  -20.36%  (p=0.000 n=8+10)
Put/size=1048576,thread=20/fstree-8        577 ± 0%       458 ± 0%  -20.72%  (p=0.000 n=9+9)
Put/size=1048576,thread=100/fstree-8     2.76k ± 0%     2.15k ± 0%  -22.05%  (p=0.000 n=9+8)
```

HDD (LVM), ext4, Ryzen 5 1600:

Sync
```
                                      │ fs.sync-generic │            fs.sync-linux            │
                                      │     sec/op      │    sec/op     vs base               │
Put/size=1024,thread=1/fstree-12           34.70m ± 19%   33.59m ± 16%       ~ (p=0.529 n=10)
Put/size=1024,thread=20/fstree-12          188.8m ±  8%   189.2m ± 16%       ~ (p=0.739 n=10)
Put/size=1024,thread=100/fstree-12         264.8m ± 22%   273.6m ± 28%       ~ (p=0.353 n=10)
Put/size=1048576,thread=1/fstree-12        54.90m ± 14%   47.08m ± 18%       ~ (p=0.063 n=10)
Put/size=1048576,thread=20/fstree-12       244.1m ± 14%   220.4m ± 22%       ~ (p=0.579 n=10)
Put/size=1048576,thread=100/fstree-12      847.2m ±  5%   893.6m ±  3%  +5.48% (p=0.000 n=10)
geomean                                    164.3m         158.9m        -3.29%

                                      │ fs.sync-generic │            fs.sync-linux             │
                                      │      B/op       │     B/op      vs base                │
Put/size=1024,thread=1/fstree-12           3.375Ki ± 1%   2.471Ki ± 1%  -26.80% (p=0.000 n=10)
Put/size=1024,thread=20/fstree-12          66.62Ki ± 6%   49.21Ki ± 6%  -26.15% (p=0.000 n=10)
Put/size=1024,thread=100/fstree-12         319.2Ki ± 1%   230.9Ki ± 2%  -27.64% (p=0.000 n=10)
Put/size=1048576,thread=1/fstree-12        3.457Ki ± 1%   2.559Ki ± 1%  -25.97% (p=0.000 n=10)
Put/size=1048576,thread=20/fstree-12       66.91Ki ± 1%   49.16Ki ± 1%  -26.52% (p=0.000 n=10)
Put/size=1048576,thread=100/fstree-12      338.8Ki ± 2%   252.3Ki ± 3%  -25.54% (p=0.000 n=10)
geomean                                    42.17Ki        31.02Ki       -26.44%

                                      │ fs.sync-generic │            fs.sync-linux            │
                                      │    allocs/op    │  allocs/op   vs base                │
Put/size=1024,thread=1/fstree-12             33.00 ± 0%    27.00 ± 0%  -18.18% (p=0.000 n=10)
Put/size=1024,thread=20/fstree-12            639.5 ± 1%    519.0 ± 2%  -18.84% (p=0.000 n=10)
Put/size=1024,thread=100/fstree-12          3.059k ± 1%   2.478k ± 2%  -18.99% (p=0.000 n=10)
Put/size=1048576,thread=1/fstree-12          33.50 ± 1%    28.00 ± 4%  -16.42% (p=0.000 n=10)
Put/size=1048576,thread=20/fstree-12         638.5 ± 1%    520.0 ± 1%  -18.56% (p=0.000 n=10)
Put/size=1048576,thread=100/fstree-12       3.209k ± 2%   2.655k ± 2%  -17.28% (p=0.000 n=10)
geomean                                      405.3         332.1       -18.05%
```

No sync
```
                                      │ fs.nosync-generic │             fs.nosync-linux              │
                                      │      sec/op       │    sec/op     vs base                    │
Put/size=1024,thread=1/fstree-12           148.2µ ± 20%     136.6µ ± 19%   -7.89% (p=0.029 n=10)
Put/size=1024,thread=20/fstree-12          1.140m ± 26%     1.364m ± 16%        ~ (p=0.143 n=10)
Put/size=1024,thread=100/fstree-12         11.93m ± 68%     26.89m ± 62%        ~ (p=0.123 n=10)
Put/size=1048576,thread=1/fstree-12        1.302m ±  3%     1.287m ±  5%        ~ (p=0.481 n=10)
Put/size=1048576,thread=20/fstree-12       77.52m ±  8%     74.07m ±  7%        ~ (p=0.278 n=10+9)
Put/size=1048576,thread=100/fstree-12      226.1m ±   ∞ ¹
geomean                                    5.986m           3.434m        +18.60%                  ²
¹ need >= 6 samples for confidence interval at level 0.95
² benchmark set differs from baseline; geomeans may not be comparable

                                      │ fs.nosync-generic │             fs.nosync-linux              │
                                      │       B/op        │     B/op      vs base                    │
Put/size=1024,thread=1/fstree-12           2.879Ki ± 0%     1.972Ki ± 0%  -31.51% (p=0.000 n=10)
Put/size=1024,thread=20/fstree-12          55.94Ki ± 1%     37.90Ki ± 1%  -32.25% (p=0.000 n=10)
Put/size=1024,thread=100/fstree-12         272.6Ki ± 0%     182.1Ki ± 9%  -33.21% (p=0.000 n=10)
Put/size=1048576,thread=1/fstree-12        3.158Ki ± 0%     2.259Ki ± 0%  -28.46% (p=0.000 n=10)
Put/size=1048576,thread=20/fstree-12       58.87Ki ± 0%     41.03Ki ± 0%  -30.30% (p=0.000 n=10+9)
Put/size=1048576,thread=100/fstree-12      299.8Ki ±  ∞ ¹
geomean                                    36.71Ki          16.60Ki       -31.17%                  ²
¹ need >= 6 samples for confidence interval at level 0.95
² benchmark set differs from baseline; geomeans may not be comparable

                                      │ fs.nosync-generic │            fs.nosync-linux            │
                                      │     allocs/op     │  allocs/op   vs base                  │
Put/size=1024,thread=1/fstree-12             28.00 ± 0%      22.00 ± 0%  -21.43% (p=0.000 n=10)
Put/size=1024,thread=20/fstree-12            530.0 ± 0%      407.5 ± 1%  -23.11% (p=0.000 n=10)
Put/size=1024,thread=100/fstree-12          2.567k ± 0%     1.956k ± 9%  -23.77% (p=0.000 n=10)
Put/size=1048576,thread=1/fstree-12          30.00 ± 0%      24.00 ± 0%  -20.00% (p=0.000 n=10)
Put/size=1048576,thread=20/fstree-12         553.5 ± 0%      434.0 ± 0%  -21.59% (n=10+9)
Put/size=1048576,thread=100/fstree-12       2.803k ±  ∞ ¹
geomean                                      347.9           178.8       -21.99%                ²
¹ need >= 6 samples for confidence interval at level 0.95
² benchmark set differs from baseline; geomeans may not be comparable
```

Signed-off-by: Roman Khimov <roman@nspcc.ru>
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
2024-02-09 16:12:11 +00:00
..
control.go [#585] fstree: Add optional file counter 2023-08-16 14:47:44 +03:00
counter.go [#585] fstree: Add optional file counter 2023-08-16 14:47:44 +03:00
fstree.go [#970] fstree: Move write functions to a separate file 2024-02-09 16:12:11 +00:00
fstree_test.go [#585] fstree: Add optional file counter 2023-08-16 14:47:44 +03:00
fstree_write_generic.go [#970] fstree: Add linux-specific file writer using O_TMPFILE 2024-02-09 16:12:11 +00:00
fstree_write_linux.go [#970] fstree: Add linux-specific file writer using O_TMPFILE 2024-02-09 16:12:11 +00:00
generic_test.go [#559] Remove manual path handling in fstree tests 2023-08-03 10:03:41 +03:00
metrics.go [#373] local storage: Pass parent ID 2023-06-21 15:13:26 +03:00
option.go [#655] storage: Drop ErrorHandler 2023-11-16 17:27:38 +03:00