Keep the EC in header, so it can be retrieved easily for dynamic quorum calculations.
To not force a full metadata decode on every read the value will be 0/0 for data written in previous versions.
Size is expected to increase by 2 bytes per version, since all valid values can be represented with 1 byte each.
Example:
```
λ xl-meta xl.meta
{
"Versions": [
{
"Header": {
"EcM": 4,
"EcN": 8,
"Flags": 6,
"ModTime": "2024-04-17T11:46:25.325613+02:00",
"Signature": "0a409875",
"Type": 1,
"VersionID": "8e03504e11234957b2727bc53eda0d55"
},
...
```
Not used for operations yet.
When no results match or another error occurs, add an error to the stream. Keep the "inspect-input.txt" as the only thing in the zip for reference.
Example:
```
λ mc support inspect --airgap myminio/testbucket/fjghfjh/**
mc: Using public key from C:\Users\klaus\mc\support_public.pem
File data successfully downloaded as inspect-data.enc
λ inspect inspect-data.enc
Using private key from support_private.pem
output written to inspect-data.zip
2024/04/11 14:10:51 next stream: GetRawData: No files matched the given pattern
λ unzip -l inspect-data.zip
Archive: inspect-data.zip
Length Date Time Name
--------- ---------- ----- ----
222 2024-04-11 14:10 inspect-input.txt
--------- -------
222 1 file
λ
```
Modifies inspect to read until end of stream to report the error.
Bonus: Add legacy commandline params
there can be a sudden spike in tiny allocations,
due to too much auditing being done, also don't hang
on the
```
h.logCh <- entry
```
after initializing workers if you do not have a way to
dequeue for some reason.
NOTE: This feature is not retro-active; it will not cater to previous transactions
on existing setups.
To enable this feature, please set ` _MINIO_DRIVE_QUORUM=on` environment
variable as part of systemd service or k8s configmap.
Once this has been enabled, you need to also set `list_quorum`.
```
~ mc admin config set alias/ api list_quorum=auto`
```
A new debugging tool is available to check for any missing counters.
Following extension allows users to specify immediate purge of
all versions as soon as the latest version of this object has
expired.
```
<LifecycleConfiguration>
<Rule>
<ID>ClassADocRule</ID>
<Filter>
<Prefix>classA/</Prefix>
</Filter>
<Status>Enabled</Status>
<Expiration>
<Days>3650</Days>
<ExpiredObjectAllVersions>true</ExpiredObjectAllVersions>
</Expiration>
</Rule>
...
```
Will combine or write partial data of each version found in the inspect data.
Example:
```
> xl-meta -export -combine inspect-data.1228fb52.zip
(... metadata json...)
}
Attempting to combine version "994f1113-da94-4be1-8551-9dbc54b204bc".
Read shard 1 Data shards 9 Parity 4 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-01-of-13.data)
Read shard 2 Data shards 9 Parity 4 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-02-of-13.data)
Read shard 3 Data shards 9 Parity 4 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-03-of-13.data)
Read shard 4 Data shards 9 Parity 4 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-04-of-13.data)
Read shard 6 Data shards 9 Parity 4 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-06-of-13.data)
Read shard 7 Data shards 9 Parity 4 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-07-of-13.data)
Read shard 8 Data shards 8 Parity 5 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-08-of-13.data)
Read shard 9 Data shards 8 Parity 5 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-09-of-13.data)
Read shard 10 Data shards 8 Parity 5 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-10-of-13.data)
Read shard 11 Data shards 8 Parity 5 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-11-of-13.data)
Read shard 13 Data shards 8 Parity 5 (994f1113-da94-4be1-8551-9dbc54b204bc/shard-13-of-13.data)
Attempting to reconstruct using parity sets:
* Setup: Data shards: 9 - Parity blocks: 6
Have 6 complete remapped data shards and 6 complete parity shards. Could NOT reconstruct: too few shards given
* Setup: Data shards: 8 - Parity blocks: 5
Have 5 complete remapped data shards and 5 complete parity shards. Could reconstruct completely
0 bytes missing. Truncating 0 from the end.
Wrote output to 994f1113-da94-4be1-8551-9dbc54b204bc.complete
```
So far only inline data, but no real reason that external data can't also be included with some handling of blocks.
Supports only unencrypted data.
data shards were wrong due to a healing bug
reported in #13803 mainly with unaligned object
sizes.
This PR is an attempt to automatically avoid
these shards, with available information about
the `xl.meta` and actually disk mtime.
Existing:
```go
type xlMetaV2 struct {
Versions []xlMetaV2Version `json:"Versions" msg:"Versions"`
}
```
Serialized as regular MessagePack.
```go
//msgp:tuple xlMetaV2VersionHeader
type xlMetaV2VersionHeader struct {
VersionID [16]byte
ModTime int64
Type VersionType
Flags xlFlags
}
```
Serialize as streaming MessagePack, format:
```
int(headerVersion)
int(xlmetaVersion)
int(nVersions)
for each version {
binary blob, xlMetaV2VersionHeader, serialized
binary blob, xlMetaV2Version, serialized.
}
```
xlMetaV2VersionHeader is <= 30 bytes serialized. Deserialized struct
can easily be reused and does not contain pointers, so efficient as a
slice (single allocation)
This allows quickly parsing everything as slices of bytes (no copy).
Versions are always *saved* sorted by modTime, newest *first*.
No more need to sort on load.
* Allows checking if a version exists.
* Allows reading single version without unmarshal all.
* Allows reading latest version of type without unmarshal all.
* Allows reading latest version without unmarshal of all.
* Allows checking if the latest is deleteMarker by reading first entry.
* Allows adding/updating/deleting a version with only header deserialization.
* Reduces allocations on conversion to FileInfo(s).
