/data/. All data lives in process memory and is lost on exit.
No setup or credentials required.
Config
RAMResource() takes no arguments.
Filesystem Layout
The RAM filesystem starts empty. Files and directories are created on demand via commands liketouch, mkdir, tee, cp, etc.
/. The root directory / always
exists.
Cache
The RAM resource usesIndexCacheStore with index_ttl = 0 (no
expiry). Since all data is in-memory, the index is always fresh,
no network calls or stale cache concerns.
Example
Shell Commands
The RAM resource supports the full set of shell commands since it handles real file content (text, binary, JSON, CSV, etc.):Read Commands
| Command | Notes |
|---|---|
cat | Read file content |
head / tail | First/last N lines |
grep / rg | Pattern search (file or directory level) |
jq | Query JSON fields |
wc | Line/word/byte counts |
stat | File metadata (name, size, type, modified) |
find | Recursive search with -name, -maxdepth |
tree | Directory tree view |
nl | Number lines |
du | Disk usage summary |
file | Detect file type |
strings | Extract printable strings from binary |
xxd | Hex dump |
md5 | MD5 checksum |
sha256sum | SHA-256 checksum |
Text Processing
| Command | Notes |
|---|---|
awk | Pattern scanning and processing |
sed | Stream editor |
tr | Translate or delete characters |
sort | Sort lines |
uniq | Remove duplicate lines |
cut | Extract fields/columns |
join | Join lines on a common field |
paste | Merge lines side by side |
column | Columnate output |
fold | Wrap lines to a specified width |
expand | Convert tabs to spaces |
unexpand | Convert spaces to tabs |
fmt | Simple text formatter |
rev | Reverse lines |
tac | Concatenate and print in reverse |
look | Display lines beginning with a given string |
shuf | Shuffle lines |
tsort | Topological sort |
comm | Compare two sorted files |
cmp | Compare two files byte by byte |
diff | Compare files line by line |
patch | Apply a diff patch |
iconv | Character encoding conversion |
File Operations
| Command | Notes |
|---|---|
cp | Copy files |
mv | Move/rename files |
rm | Remove files |
mkdir | Create directories |
touch | Create empty file or update timestamp |
ln | Create symbolic links |
tee | Write stdin to file and stdout |
mktemp | Create temporary file |
split | Split file into pieces |
csplit | Split file by context |
Path Utilities
| Command | Notes |
|---|---|
basename | Strip directory from path |
dirname | Strip filename from path |
realpath | Resolve path |
readlink | Print symbolic link target |
ls | List directory contents |
Compression
| Command | Notes |
|---|---|
gzip | Compress files |
gunzip | Decompress gzip files |
zip | Create zip archives |
unzip | Extract zip archives |
tar | Archive files |
zcat | Cat compressed files |
zgrep | Grep compressed files |
Encoding
| Command | Notes |
|---|---|
base64 | Base64 encode/decode |
Data Format Support
Commands with format-specific variants for structured data files:| Format | Extension | Variants |
|---|---|---|
| Parquet | .parquet | cat, head, tail, wc, stat, cut, grep, ls, file |
| Feather | .feather | cat, head, tail, wc, stat, cut, grep, ls, file |
| ORC | .orc | cat, head, tail, wc, stat, cut, grep, ls, file |
| HDF5 | .hdf5 | cat, head, tail, wc, stat, cut, grep, ls, file |
Use Cases
- Testing: Fast filesystem for unit tests without I/O
- Staging: Temporary data area during pipelines
- Prototyping: Develop against a filesystem before switching to S3/disk
- Caching: In-process data exchange between commands
- Ephemeral workspaces: Create, process, discard - no cleanup needed