Initial Sharder

Initial Sharding utility (ishard) is intended to create well-formed WebDataset-formatted shards from the original dataset.

Note that original ML datasets will have an arbitrary structure, a massive number of small files and/or very large files, and deeply nested directories. Notwithstanding, there's almost always the need to batch associated files (that constitute computable samples) together and maybe pre-shuffle them for immediate consumption by a model.

Hence, ishard.

Background

At the lowest level, a shard is any .tar, .tgz or .tar.gz, .zip, or .tar.lz4 formatted object. AIStore equally supports all these formats, which share one common property: all 4 (four) are iterable serialized archives storing original file names and metadata. AIStore provides APIs and CLI to read, write (and append), and list existing shards.

All sharding formats are equally supported across the entire set of AIS APIs. For instance, list-objects API supports "opening" shards and including contents of archived directories into generated result sets. Clients can run concurrent multi-object (source bucket => destination bucket) transactions to en masse generate new archives from selected subsets of files, and more.

On top of these basic capabilities, there's the already mentioned WebDataset convention which, in the most simple terms, requires that computable samples do not cross a shard boundaries.

To give a quick example, a/b/c/toyota.jpeg and a/b/c/toyota.json from an original dataset are considered part of the same sample (a.k.a. record) and must be stored together in one shard.

Terms

File: Represents individual files in the source bucket. The file names are substituted into sample keys based on a configurable rule called sample_key_pattern.
Sample: Groups multiple files with the same sample key into a single structure. After ishard execution, samples are indivisible and will always be included together in the same output shard.
Shard: Represents the output of ishard, which is a collection of files archived in .tar, .tgz or .tar.gz, .zip, or .tar.lz4 formats.

CLI Parameters

-sample_key_pattern: The pattern used to substitute source file names to sample keys. This ensures that files with the same sample key are always merged into the same output shard.
- -sample_key_pattern="base_filename": The default option. Extracts and uses only the base filename as the sample key to merge. Removes all directory paths and extensions.
- -sample_key_pattern="full_name": Performs no substitution, using the entire file name without extension as the sample key.
- -sample_key_pattern="collapse_all_dir": Removes all '/' characters from the file name, using the resulting string as the sample key.
- -sample_key_pattern="custom_regex": Applies a custom regex pattern to substitute the file names to sample keys for your specific requirements.
-shard_size: Specifies the approximate size of each output shard. The default value is 1MiB. This option supports both count-based and size-based formats:
- Count-Based Format:
  - -shard_size="10": Sets the number of samples contained in each output shard to 10.
- Size-Based Formats:
  - -shard_size="16MiB": Sets the size of each output shard to "16MiB" using the IEC format.
  - -shard_size="4KB": Sets the size of each output shard to "4KB" using the SI format.
-src_bck: The source bucket name or URI.
-dst_bck: The destination bucket name or URI.
-shard_template: The template used for generating output shards. Accepts Bash, Fmt, or At formats.
- -shard_template="prefix-{0000..4096..8}-suffix": Generate output shards prefix-0000-suffix, prefix-0008-suffix, prefix-00016-suffix, and so on.
- -shard_template="prefix-%06d-suffix": Generate output shards prefix-000000-suffix, prefix-000001-suffix, prefix-000002-suffix, and so on.
- -shard_template="prefix-@00001-gap-@100-suffix": Generate output shards prefix-00001-gap-001-suffix, prefix-00001-gap-002-suffix, and so on.
ekm: Specify an external key map (EKM) to pack samples into shards based on customized regex categories, either as a JSON string or a path to a JSON file.
- ekm="/path/to/ekm.json": Specify EKM as a path to a JSON file.
- ekm="{\"fish-%d.tar\": [\"train/n01440764.*\", \"train/n01443537.*\"], \"dog-%d.tar\": [\"train/n02084071.*\", \"train/n02085782.*\"]}": Specify EKM as an inline JSON string.
-ext: The extension used for generating output shards. Supports .tar, .tgz, .tar.gz, .zip, and .tar.lz4 formats.
-sample_exts: A comma-separated list of required extensions for all samples in the dataset. See -missing_extension_action for handling missing extensions.
-missing_extension_action: Specifies the action to take when an expected extension is missing from a sample. Options are: abort | warn | ignore | exclude.
- -missing_extension_action="ignore": Do nothing when an expected extension is missing.
- -missing_extension_action="warn": Print a warning if a sample contains an unspecified extension.
- -missing_extension_action="abort": Stop the process if a sample contains an unspecified extension.
- -missing_extension_action="exclude": Exclude any incomplete records and remove unnecessary extensions.
-collapse: If true, files in a subdirectory will be flattened and merged into its parent directory if their overall size doesn't reach the desired shard size.
-progress: If true, display the progress of processing objects in the source bucket.
-dry_run: If set, only shows the layout of resulting output shards without actually executing archive jobs. Use -dry_run="show_keys" to include sample keys.
-sort: Specifies the sorting algorithm for files within shards. Also see dSort
- -sort="alpha:inc": Sorts the items in alphanumeric order in ascending (increasing) order.
- -sort="alpha:dec": Sorts the items in alphanumeric order in descending (decreasing) order.
- -sort="shuffle": Randomly shuffles the items without a specific seed.
- -sort="shuffle:124123": Randomly shuffles the items using the specified seed 124123 for reproducibility. If the seed cannot be parsed as an integer, the flag is rejected.

Initial Setup

Build the Package:

$ cd cmd/ishard
$ go mod tidy
$ go build -o ishard .

Sample Usages

Let's say we have an ImageNet dataset with the following layout on the local file system:

$ tree ./ImageNet

ImageNet/
├── Annotations
│   ├── n00000333
│   │   ├── n00000333_01.xml
│   │   └── n00000333_02.xml
│   ├── n00000369
│   │   ├── n00000369_01.xml
│   │   ├── n00000369_02.xml
│   │   ├── n00000369_03.xml
│   │   └── n00000369_04.xml
│   ├── n00000565
│   └── ...
└── Data
    ├── train
    │   ├── n00000333
    │   │   ├── n00000333_01.JPEG
    │   │   ├── n00000333_02.JPEG
    │   │   ├── n00000333_02.loss
    │   │   ├── n00000333_03.JPEG
    │   │   └── n00000333_03.loss
    │   ├── n00000369
    │   │   ├── n00000369_01.JPEG
    │   │   ├── n00000369_01.loss
    │   │   ├── n00000369_02.JPEG
    │   │   ├── n00000369_02.loss
    │   │   ├── n00000369_03.JPEG
    │   │   └── n00000369_04.JPEG
    │   ├── n00000565
    │   └── ...
    └── val
        ├── n00000333
        │   ├── ILSVRC2012_val_00001851.JPEG
        │   ├── ILSVRC2012_val_00006595.JPEG
        │   ├── ILSVRC2012_val_00007175.JPEG
        │   ├── ILSVRC2012_val_00012920.JPEG
        │   └── ILSVRC2012_val_00021981.JPEG
        ├── n00000369
        │   ├── ILSVRC2012_val_00001436.JPEG
        │   ├── ILSVRC2012_val_00016182.JPEG
        |   └── ...
        └── ...

To put the entire directory into a bucket using CLI:

$ ais bucket create ais://ImageNet
$ ais put "./ImageNet" ais://ImageNet --recursive
$ ais bucket ls ais://ImageNet | less

NAME                                                             SIZE            
ImageNet/Annotations/n00000333/n00000333_01.xml                  100B            
ImageNet/Annotations/n00000333/n00000333_02.xml                  100B            
ImageNet/Annotations/n00000369/n00000369_01.xml                  100B            
ImageNet/Annotations/n00000369/n00000369_02.xml                  100B            
...
ImageNet/Data/train/n00000333/n00000333_01.JPEG                  30.00KiB        
ImageNet/Data/train/n00000333/n00000333_02.JPEG                  30.00KiB        
ImageNet/Data/train/n00000333/n00000333_02.loss                  8B            
ImageNet/Data/train/n00000333/n00000333_03.JPEG                  30.00KiB        
ImageNet/Data/train/n00000333/n00000333_03.loss                  8B            
ImageNet/Data/train/n00000369/n00000369_01.JPEG                  30.00KiB        
ImageNet/Data/train/n00000369/n00000369_01.loss                  8B            
ImageNet/Data/train/n00000369/n00000369_02.JPEG                  30.00KiB        
ImageNet/Data/train/n00000369/n00000369_02.loss                  8B            
...
ImageNet/Data/val/n00000333/ILSVRC2012_val_00001851.JPEG         30.00KiB        
ImageNet/Data/val/n00000333/ILSVRC2012_val_00006595.JPEG         30.00KiB        
ImageNet/Data/val/n00000333/ILSVRC2012_val_00007175.JPEG         30.00KiB        
...

Correct Usages

Sharding a large dataset can take hours to complete. Therefore, it is highly recommended to first perform a dry-run of your ishard command to ensure it performs the desired sample key substitution and produces the expected output shard composition. See the Dry Run section below for more details.

Execute ishard with default sample key:

When sample_key_pattern is not specified, ishard uses base_file_name as sample key. This means that source files with the same base name (without extensions) will be sharded together. For example, the following three files:

ImageNet/Annotations/n00000333/n00000333_02.xml
ImageNet/Data/train/n00000333/n00000333_02.JPEG
ImageNet/Data/train/n00000333/n00000333_02.loss

They have the same base name n00000333_02, and therefore will always present in the same output shard, regardless of shard_size value.

./ishard -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out

$ ais archive ls ais://ImageNet-out | less

NAME                                                                          SIZE            
shard-0.tar                                                                   1.00MiB       
   shard-0.tar/ImageNet/Annotations/n00000333/n00000333_01.xml                100B            
   shard-0.tar/ImageNet/Annotations/n00000333/n00000333_02.xml                100B            
   ...
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_02.JPEG                30.00KiB        
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_02.loss                100B            
   shard-0.tar/ImageNet/Data/train/n00000369/n00000369_01.JPEG                30.00KiB        
   ...
shard-1.tar                                                                   129.00KiB       
...

Execute ishard with full_name as sample key:

When sample_key_pattern is set to full_name, source files with the same full name (without extensions) will be sharded together. For example, the following two files:

ImageNet/Data/train/n00005739/n00005739_01.JPEG
ImageNet/Data/train/n00005739/n00005739_01.loss

They have the same full name ImageNet/Data/train/n00005739/n00005739_01 and therefore will always present in the same output shard. But file ImageNet/Annotations/n00005739/n00005739_01.xml has different full name ImageNet/Annotations/n00005739/n00005739_01, and therefore will be sharded separately.

$ ./ishard -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -sample_key_pattern="full_name"

NAME                                                            SIZE            
...
shard-059.tar                                                   200B
   shard-059/ImageNet/Annotations/n00005739/n00005739_01.xml    100B
   shard-059/ImageNet/Annotations/n00005739/n00005739_02.xml    100B
...
shard-097.tar                                                   90.20KiB
   shard-097/ImageNet/Data/train/n00005739/n00005739_01.JPEG    30.00KiB
   shard-097/ImageNet/Data/train/n00005739/n00005739_01.loss    100B
   shard-097/ImageNet/Data/train/n00005739/n00005739_02.JPEG    30.00KiB
   shard-097/ImageNet/Data/train/n00005739/n00005739_03.JPEG    30.00KiB
   shard-097/ImageNet/Data/train/n00005739/n00005739_03.loss    100B
shard-098.tar                                                   60.00KiB
...

By default, ishard ensures that files with different virtual directories (after applying sample_key_pattern) won't be present in the same output shard. In other words, ishard maintains clear boundaries between files that belong to different virtual directories, even if an output shard's size doesn't reach the requested shard_size. As shown in the example above, there are only two objects in the shard-059.tar output shard regardless of the shard_size value, since they are the only two files under their virtual directories.

To disable this default setting and compact each output shard's size closer to shard_size, regardless of virtual directories, you can specify -collapse flag. This will to flatten samples into its parent virtual directory if their overall size doesn't reach shard_size.

$ ./ishard -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -sample_key_pattern="full_name" -collapse

NAME                                                                    SIZE            
shard-0.tar                                                             1.03MiB
   shard-0/ImageNet/Data/train/n00003215/n00003215_01.JPEG              30.00KiB
   shard-0/ImageNet/Data/train/n00003215/n00003215_02.JPEG              30.00KiB
   shard-0/ImageNet/Data/train/n00003215/n00003215_02.loss              100B
   shard-0/ImageNet/Data/train/n00003215/n00003215_03.JPEG              30.00KiB
...
shard-6.tar                                                             1.03MiB
   shard-6/ImageNet/Data/val/n00015250/ILSVRC2012_val_00001158.JPEG     30.00KiB
   shard-6/ImageNet/Data/val/n00015250/ILSVRC2012_val_00007151.JPEG     30.00KiB
   shard-6/ImageNet/Data/val/n00015250/ILSVRC2012_val_00017846.JPEG     30.00KiB
   shard-6/ImageNet/Data/val/n00015250/ILSVRC2012_val_00020293.JPEG     30.00KiB
...
shard-12.tar                                                            653.05KiB
   shard-12/ImageNet/Annotations/n00023258/n00023258_01.xml             100B
   shard-12/ImageNet/Annotations/n00023258/n00023258_02.xml             100B
   shard-12/ImageNet/Annotations/n00032644/n00032644_01.xml             100B
   shard-12/ImageNet/Annotations/n00032644/n00032644_02.xml             100B
   shard-12/ImageNet/Annotations/n00032644/n00032644_03.xml             100B
...

Customized regex sample key: You can also provide your own sample_key_pattern as regex for sample key substitution. For example, the following demonstrates how to only extract the last level of virtual directory name n00000333 as sample key using custom regex .*/([^/]+)/[^/]+$.

$ ./ishard -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -sample_key_pattern=".*/([^/]+)/[^/]+$"

2024/07/11 11:34:26 `sample_key_pattern` .*/([^/]+)/[^/]+$ is not built-in (`base_file_name` | `full_name` | `collapse_all_dir`), compiled as custom regex.

$ ais archive ls ais://ImageNet-out | less

NAME                                                                   SIZE            
shard-0.tar                                                            1.17MiB
   shard-0/ImageNet/Annotations/n00000333/n00000333_01.xml             100B
   shard-0/ImageNet/Annotations/n00000333/n00000333_02.xml             100B
   shard-0/ImageNet/Data/train/n00000333/n00000333_01.JPEG             30.00KiB
   shard-0/ImageNet/Data/train/n00000333/n00000333_02.JPEG             30.00KiB
   shard-0/ImageNet/Data/train/n00000333/n00000333_02.loss             100B
   shard-0/ImageNet/Data/train/n00000333/n00000333_03.JPEG             30.00KiB
   shard-0/ImageNet/Data/train/n00000333/n00000333_03.loss             100B
   shard-0/ImageNet/Data/val/n00000333/ILSVRC2012_val_00001851.JPEG    30.00KiB
   shard-0/ImageNet/Data/val/n00000333/ILSVRC2012_val_00006595.JPEG    30.00KiB
   shard-0/ImageNet/Data/val/n00000333/ILSVRC2012_val_00007175.JPEG    30.00KiB
   shard-0/ImageNet/Data/val/n00000333/ILSVRC2012_val_00012920.JPEG    30.00KiB
   shard-0/ImageNet/Data/val/n00000333/ILSVRC2012_val_00021981.JPEG    30.00KiB
   shard-0/ImageNet/Annotations/n00000369/n00000369_01.xml             100B
...

Filter source files using prefix: You can specify a prefix for the files to include in ishard using the src_bck parameter. For example, the following command specifies Data as the prefix in the source bucket, which includes only the files whose names start with Data.

$ ./ishard -src_bck=ais://ImageNet/ImageNet/Data -dst_bck=ais://ImageNet-out

$ ais archive ls ais://ImageNet-out | less

NAME                                                                             SIZE            
shard-0.tar                                                                      1.03MiB         
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_01.JPEG                  30.00KiB        
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_02.JPEG                  30.00KiB        
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_02.loss                  100B            
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_03.JPEG                  30.00KiB        
   shard-0.tar/ImageNet/Data/train/n00000333/n00000333_03.loss                  100B            
   shard-0.tar/ImageNet/Data/train/n00000369/n00000369_01.JPEG                  30.00KiB        
   shard-0.tar/ImageNet/Data/train/n00000369/n00000369_01.loss                  100B            
   shard-0.tar/ImageNet/Data/train/n00000369/n00000369_02.JPEG                  30.00KiB        
   shard-0.tar/ImageNet/Data/train/n00000369/n00000369_02.loss                  100B            
   shard-0.tar/ImageNet/Data/train/n00000369/n00000369_03.JPEG                  30.00KiB        
...

Generate output shards name using template: You can use various templates to generate output shards using -shard_template. For example:

$ ./ishard -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -shard_template="pre-{0000..8192..8}-suf"

NAME                                                                            SIZE            
pre-0000-suf.tar                                                                1.07MiB         
   pre-0000-suf.tar/ImageNet/Annotations/n00000333/n00000333_01.xml             100B            
   pre-0000-suf.tar/ImageNet/Annotations/n00000333/n00000333_02.xml             100B            
...
pre-0008-suf.tar                                                                1.07MiB         
   pre-0008-suf.tar/ImageNet/Annotations/n00005864/n00005864_02.xml             100B            
   pre-0008-suf.tar/ImageNet/Annotations/n00007702/n00007702_01.xml             100B            
...
pre-0016-suf.tar                                                                1.07MiB         
   pre-0016-suf.tar/ImageNet/Annotations/n00014536/n00014536_02.xml             100B            
   pre-0016-suf.tar/ImageNet/Annotations/n00015250/n00015250_01.xml             100B            
...

Generate output shards name using template: You can pack samples into shards based on customized categories using -ekm. For example, the following example EKM file will pack all samples matching to these specified templates into their corresponding category.

{
   "fish-%d.tar": [
      "train/n01440764.*",  // tench
      "train/n01443537.*",  // goldfish
      ...
   ],
   "dog-%d.tar": [
      "train/n02084071.*",  // toy terrier
      "train/n02085782.*",  // Japanese spaniel
      "train/n02085936.*",  // Maltese dog
      ...
   ],
   "bird-%d.tar": [
      "train/n01514668.*",  // cock
      "train/n01514859.*",  // hen
      ...
   ],
}

$ ./ishard -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -ekm="/path/to/category.json"

$ ais archive ls ais://ImageNet-out | less

NAME                                                     SIZE            
bird-0.tar                                               1.08MiB         
   bird-0.tar/train/n01514668/n01514668_10004.JPEG      124.09KiB       
   bird-0.tar/train/n01514668/n01514668_10014.JPEG      202.01KiB       
...
bird-176.tar                                             1.06MiB         
   bird-176.tar/train/n01514668/n01514668_9964.JPEG     133.77KiB       
   bird-176.tar/train/n01514668/n01514668_9973.JPEG     95.13KiB        
   bird-176.tar/train/n01514859/n01514859_1.JPEG        117.13KiB       
   bird-176.tar/train/n01514859/n01514859_10021.JPEG    257.52KiB       
   bird-176.tar/train/n01514859/n01514859_10028.JPEG    107.14KiB       
...
dog-0.tar                                                1.36MiB         
   dog-0.tar/train/n02085782/n02085782_1006.JPEG        1.01KiB         
   dog-0.tar/train/n02085782/n02085782_10073.JPEG       2.40KiB         
   dog-0.tar/train/n02085782/n02085782_10135.JPEG       45.49KiB        
   dog-0.tar/train/n02085782/n02085782_10216.JPEG       32.59KiB        
...
fish-0.tar                                               1.01MiB         
   fish-0.tar/train/n01440764/n01440764_10026.JPEG      13.38KiB        
   fish-0.tar/train/n01440764/n01440764_10027.JPEG      9.45KiB         
   fish-0.tar/train/n01440764/n01440764_10029.JPEG      65.46KiB        
   fish-0.tar/train/n01440764/n01440764_10040.JPEG      143.06KiB       
...

Incorrect Usages

The number of generated output shards can't fit into specified shard-template.

$ ./ishard -shard_size=256KiB -src_bck=ais://sample -dst_bck=ais://sample-out -collapse -sample_key_pattern="base_filename" -shard_template="pre-{0000..50..8}-suf"

Error: number of shards to be created exceeds expected number of shards (7)

Provides invalid regex sample_key_pattern.

$ ./ishard -shard_size=256KiB -src_bck=ais://sample -dst_bck=ais://sample-out -collapse -sample_key_pattern="(.*'" -shard_template="pre-{0000..8192..8}-suf"

Invalid regex pattern: (.*'. Error: error parsing regexp: missing closing ): `(.*'`

Dry Run

The -dry_run flag in the CLI parameters allows ishard to only print a preview of the output shards composition without performing the actual archiving tasks. This is especially useful when working with large datasets, where the full execution of ishard can take hours to complete.

$ ./ishard-cli -shard_size=120KiB -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -sample_key_pattern="base_file_name" -shard_template="pre-{0000..8192..8}-suf" -dry_run | less

pre-0000-suf.tar                                                        120.68KiB
    pre-0000-suf/ImageNet/Annotations/n00000333/n00000333_01.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000333/n00000333_01.JPEG        30.00KiB
    pre-0000-suf/ImageNet/Annotations/n00000333/n00000333_02.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000333/n00000333_02.JPEG        30.00KiB
    pre-0000-suf/ImageNet/Data/train/n00000333/n00000333_02.loss        100B
    pre-0000-suf/ImageNet/Annotations/n00000369/n00000369_01.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000369/n00000369_01.JPEG        30.00KiB
    pre-0000-suf/ImageNet/Data/train/n00000369/n00000369_01.loss        100B
    pre-0000-suf/ImageNet/Annotations/n00000369/n00000369_02.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000369/n00000369_02.JPEG        30.00KiB
    pre-0000-suf/ImageNet/Data/train/n00000369/n00000369_02.loss        100B
pre-0008-suf.tar                                                        120.59KiB
    pre-0008-suf/ImageNet/Annotations/n00000369/n00000369_03.xml        100B
...

You can also apply -dry_run="show_keys" to display the key of each group of samples after sample_key_pattern substitution. The string inside [] in the output represents the sample key of the sample to which the following files belong.

$ ./ishard-cli -shard_size=120KiB -src_bck=ais://ImageNet -dst_bck=ais://ImageNet-out -sample_key_pattern="base_file_name" -shard_template="pre-{0000..8192..8}-suf" -dry_run="show_keys" | less

pre-0000-suf.tar                                                        120.68KiB
  [n00000333_01]                                                        
    pre-0000-suf/ImageNet/Annotations/n00000333/n00000333_01.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000333/n00000333_01.JPEG        30.00KiB
  [n00000333_02]                                                        
    pre-0000-suf/ImageNet/Annotations/n00000333/n00000333_02.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000333/n00000333_02.JPEG        30.00KiB
    pre-0000-suf/ImageNet/Data/train/n00000333/n00000333_02.loss        100B
  [n00000369_01]                                                        
    pre-0000-suf/ImageNet/Annotations/n00000369/n00000369_01.xml        100B
    pre-0000-suf/ImageNet/Data/train/n00000369/n00000369_01.JPEG        30.00KiB
    pre-0000-suf/ImageNet/Data/train/n00000369/n00000369_01.loss        100B
  [n00000369_02]                                                        
...

Running the Tests

Test in Short Mode

go test -v -short

Test in Complete Mode

go test -v

Test in Debug Mode

go test -v -short -tags=debug

Test for a Specific Case

go test -v -short -tags=debug -run=TestIshardShardSize

TODO List

Naming Template Placeholder
ETL Integration
On-the-fly ishard

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README.md

README.md

Initial Sharder

Background

Terms

CLI Parameters

Initial Setup

Sample Usages

Correct Usages

Incorrect Usages

Dry Run

Running the Tests

TODO List

Files

README.md

Latest commit

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README.md

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Initial Sharder

Background

Terms

CLI Parameters

Initial Setup

Sample Usages

Correct Usages

Incorrect Usages

Dry Run

Running the Tests

TODO List