{"id":4827,"date":"2025-08-26T13:24:23","date_gmt":"2025-08-26T13:24:23","guid":{"rendered":"https:\/\/uplatz.com\/blog\/?p=4827"},"modified":"2025-08-27T02:30:47","modified_gmt":"2025-08-27T02:30:47","slug":"dvc-data-version-control-pocket-book","status":"publish","type":"post","link":"https:\/\/uplatz.com\/blog\/dvc-data-version-control-pocket-book\/","title":{"rendered":"DVC (Data Version Control) Pocket Book"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/4-1024x576.png\" alt=\"DVC Pocket Book\" width=\"840\" height=\"473\" class=\"alignnone size-large wp-image-4836\" srcset=\"https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/4-1024x576.png 1024w, https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/4-300x169.png 300w, https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/4-768x432.png 768w, https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/4.png 1280w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/><br \/>\n<!-- DVC (Data Version Control) Pocket Book \u2014 Uplatz (50 Cards, Wide Layout, Readable Code, Scoped Styles) --><\/p>\n<div style=\"margin: 16px 0;\">\n<style>\n    .wp-nodejs-pb { font-family: Arial, sans-serif; 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background:#fff1f2 !important; }\n    .bg-cyan{ border-left-color:#06b6d4 !important; background:#ecfeff !important; }\n    .bg-lime{ border-left-color:#16a34a !important; background:#f0fdf4 !important; }\n    .bg-orange{ border-left-color:#f97316 !important; background:#fff7ed !important; }\n    .bg-indigo{ border-left-color:#6366f1 !important; background:#eef2ff !important; }\n    .bg-emerald{ border-left-color:#22c55e !important; background:#ecfdf5 !important; }\n    .bg-slate{ border-left-color:#334155 !important; background:#f8fafc !important; }<\/p>\n<p>    \/* Utilities *\/\n    .tight ul{ margin:0; padding-left:18px; }\n    .tight li{ margin:4px 0; }\n    .mono{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }\n    .kbd{ background:#e5e7eb; border:1px solid #cbd5e1; padding:1px 6px; border-radius:6px; font-family:ui-monospace,monospace; font-size:.88em; }\n    .muted{ color:#64748b; }\n    .wp-nodejs-pb code{ background:#f1f5f9; padding:0 4px; border-radius:4px; border:1px solid #e2e8f0; }\n    .wp-nodejs-pb pre{\n      background:#f5f5f5; color:#111827; border:1px solid #e5e7eb;\n      padding:12px; border-radius:8px; overflow:auto; font-size:.92rem; line-height:1.55;\n    }\n    .q{font-weight:700;}\n    .qa p{ margin:8px 0; }\n    .qa b{ color:#0f172a; }\n  <\/style>\n<div class=\"wp-nodejs-pb\">\n<div class=\"heading\">\n<h2>DVC Pocket Book \u2014 Uplatz<\/h2>\n<p>      50 deep-dive flashcards \u2022 Wide layout \u2022 Fewer scrolls \u2022 20+ Interview Q&amp;A \u2022 Readable code examples\n    <\/p><\/div>\n<div class=\"grid\">\n      <!-- ===================== SECTION 1 ===================== --><\/p>\n<div class=\"section-title\">Section 1 \u2014 Fundamentals<\/div>\n<div class=\"card bg-blue\">\n<h3>1) What is DVC?<\/h3>\n<p>        Data Version Control (DVC) brings Git-like versioning to large data, models, and ML pipelines. It tracks files via metafiles and stores content in remote object storage, enabling reproducible experiments and collaboration.<\/p>\n<pre><code class=\"mono\">pip install dvc\r\ndvc --version<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-green\">\n<h3>2) Why DVC? Strengths &amp; Tradeoffs<\/h3>\n<p>        Strengths: Git-native workflow, reproducible pipelines, data\/model sharing, cheap cloud storage, experiment tracking. Tradeoffs: extra commands to learn; remote and cache need setup discipline.<\/p>\n<pre><code class=\"mono\"># Start in an existing Git repo\r\ngit init\r\ndvc init<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-amber\">\n<h3>3) Repo Structure<\/h3>\n<p>        Code in Git, big data in DVC. Metafiles (<code>.dvc<\/code>, <code>dvc.yaml<\/code>, <code>dvc.lock<\/code>) live in Git; actual blobs go to cache\/remote.<\/p>\n<pre><code class=\"mono\">.git\/\r\n.dvc\/        # cache config\r\ndata\/        # large files tracked by DVC\r\nmodels\/      # model artifacts tracked by DVC<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-violet\">\n<h3>4) DVC vs Git LFS<\/h3>\n<p>        Git LFS keeps blobs in Git hosting; DVC uses your object storage (S3\/GS\/Azure\/etc.) and adds pipelines\/metrics\/experiments\u2014more MLOps features.<\/p>\n<pre><code class=\"mono\"># DVC stores pointers, not blobs, in Git<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-rose\">\n<h3>5) Remotes (Storage)<\/h3>\n<p>        Remotes hold actual data: S3, GCS, Azure, SSH, WebDAV, local NAS, etc. You can have multiple; set a default.<\/p>\n<pre><code class=\"mono\">dvc remote add -d storage s3:\/\/my-bucket\/proj\r\ndvc remote modify storage profile default<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-cyan\">\n<h3>6) What DVC Tracks<\/h3>\n<p>        Datasets, models, intermediate artifacts, metrics (<code>.json\/.csv\/.tsv<\/code>), plots (<code>.json\/.tsv<\/code>), and parameters (<code>params.yaml<\/code>).<\/p>\n<pre><code class=\"mono\">dvc add data\/raw\/imagenet<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-lime\">\n<h3>7) Core Files<\/h3>\n<p>        <b>.dvc<\/b> (single file tracking for non-pipeline artifacts), <b>dvc.yaml<\/b> (pipeline), <b>dvc.lock<\/b> (frozen state for reproducibility).<\/p>\n<pre><code class=\"mono\">git add data\/raw.dvc dvc.yaml dvc.lock<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-orange\">\n<h3>8) Install &amp; Init<\/h3>\n<p>        Install DVC and initialize in your Git repo. Commit the created files.<\/p>\n<pre><code class=\"mono\">pipx install dvc[all]\r\ndvc init\r\ngit commit -m \"Init DVC\"<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-indigo\">\n<h3>9) Terminology<\/h3>\n<p>        <b>Stage<\/b> (a pipeline step), <b>deps<\/b> (inputs), <b>outs<\/b> (outputs), <b>params<\/b> (tunable vars), <b>cache<\/b> (deduped content store).<\/p>\n<pre><code class=\"mono\">dvc stage add -n train -d data -d code -o models python train.py<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-emerald\">\n<h3>10) Q&amp;A \u2014 \u201cWhen prefer DVC over plain Git?\u201d<\/h3>\n<p>        <span class=\"q\">Answer:<\/span> When files are big or change often, when you need pipelines\/experiments, or want cheap object storage rather than bloating your Git repo.\n      <\/div>\n<p>      <!-- ===================== SECTION 2 ===================== --><\/p>\n<div class=\"section-title\">Section 2 \u2014 Core Commands &amp; Tracking<\/div>\n<div class=\"card bg-blue\">\n<h3>11) dvc add<\/h3>\n<p>        Track a dataset or file without a pipeline. Produces a <code>.dvc<\/code> metafile and pushes content to cache\/remote.<\/p>\n<pre><code class=\"mono\">dvc add data\/raw.csv\r\ngit add data\/raw.csv.dvc .gitignore\r\ngit commit -m \"Track raw data\"<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-green\">\n<h3>12) dvc commit<\/h3>\n<p>        After changing an output manually, update DVC metadata to record the new hash.<\/p>\n<pre><code class=\"mono\"># Modify generated file, then:\r\ndvc commit data\/raw.csv.dvc<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-amber\">\n<h3>13) Push \/ Pull \/ Fetch<\/h3>\n<p>        Sync data with the default remote. <b>push<\/b> uploads cache objects; <b>pull<\/b> downloads needed files; <b>fetch<\/b> gets cache without placing in workspace.<\/p>\n<pre><code class=\"mono\">dvc push\r\ndvc pull\r\ndvc fetch<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-violet\">\n<h3>14) Status<\/h3>\n<p>        Compare workspace to the tracked state (lockfile). Great to know what needs re-running or pushing.<\/p>\n<pre><code class=\"mono\">dvc status\r\ndvc status -c   # compare to cloud\/remote<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-rose\">\n<h3>15) Diff<\/h3>\n<p>        See what data\/outs changed between Git commits, branches, or tags.<\/p>\n<pre><code class=\"mono\">dvc diff HEAD~1 HEAD<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-cyan\">\n<h3>16) Parameters<\/h3>\n<p>        Store tunables in <code>params.yaml<\/code>; DVC tracks usage and diffs changes.<\/p>\n<pre><code class=\"mono\"># params.yaml\r\ntrain:\r\n  lr: 0.001\r\n  epochs: 10<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-lime\">\n<h3>17) Metrics<\/h3>\n<p>        Log metrics as JSON\/CSV\/TSV; DVC can show and diff them across commits\/experiments.<\/p>\n<pre><code class=\"mono\">dvc metrics show\r\ndvc metrics diff main..exp-123<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-orange\">\n<h3>18) Plots<\/h3>\n<p>        Track curves (loss, ROC, PR). Generate HTML\/JSON plots and diff across revisions.<\/p>\n<pre><code class=\"mono\">dvc plots diff -t simple main..HEAD<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-indigo\">\n<h3>19) Data Sharing<\/h3>\n<p>        Use <code>dvc get<\/code> to fetch a file\/dir from another DVC repo; <code>dvc import<\/code> to link and update later; <code>import-url<\/code> for external URLs.<\/p>\n<pre><code class=\"mono\">dvc get https:\/\/github.com\/org\/data-registry data\/iris.csv\r\ndvc import https:\/\/github.com\/org\/data-registry data\/iris.csv<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-emerald\">\n<h3>20) Q&amp;A \u2014 \u201cHow do teammates get the data?\u201d<\/h3>\n<p>        <span class=\"q\">Answer:<\/span> They pull code with Git, then run <code>dvc pull<\/code> (with the right remote creds). DVC recreates files from the shared cache\/remote.\n      <\/div>\n<p>      <!-- ===================== SECTION 3 ===================== --><\/p>\n<div class=\"section-title\">Section 3 \u2014 Pipelines &amp; Experiments<\/div>\n<div class=\"card bg-blue\">\n<h3>21) Stages (Basics)<\/h3>\n<p>        Define a stage with deps\/outs\/params and a command. DVC executes and tracks outputs.<\/p>\n<pre><code class=\"mono\">dvc stage add -n preprocess \\\r\n  -d data\/raw.csv -o data\/clean.csv \\\r\n  python scripts\/preprocess.py<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-green\">\n<h3>22) dvc.yaml Structure<\/h3>\n<p>        Stages are stored in <code>dvc.yaml<\/code>. Lockfile has exact hashes for reproducibility.<\/p>\n<pre><code class=\"mono\">stages:\r\n  preprocess:\r\n    cmd: python scripts\/preprocess.py\r\n    deps: [data\/raw.csv, scripts\/preprocess.py]\r\n    outs: [data\/clean.csv]<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-amber\">\n<h3>23) outs, outs_no_cache, persist<\/h3>\n<p>        <code>outs<\/code> go to cache; <code>outs_no_cache<\/code> keep on disk only; <code>persist<\/code> keeps files between runs.<\/p>\n<pre><code class=\"mono\">outs_no_cache:\r\n  - reports\/large.html<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-violet\">\n<h3>24) Cache<\/h3>\n<p>        Content-addressed store under <code>.dvc\/cache<\/code>. Dedupes identical files across commits\/branches.<\/p>\n<pre><code class=\"mono\">du -sh .dvc\/cache   # monitor size<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-rose\">\n<h3>25) Reproduce<\/h3>\n<p>        Rerun necessary stages when deps\/params change. DVC determines minimal work.<\/p>\n<pre><code class=\"mono\">dvc repro   # rebuild affected stages only<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-cyan\">\n<h3>26) Experiments (exp run)<\/h3>\n<p>        Run variations without committing to Git immediately. Track params, metrics, and artifacts.<\/p>\n<pre><code class=\"mono\">dvc exp run -S train.lr=0.0005 -S train.epochs=20<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-lime\">\n<h3>27) Manage Experiments<\/h3>\n<p>        List, show diffs, apply the best, or branch it.<\/p>\n<pre><code class=\"mono\">dvc exp show\r\ndvc exp diff\r\ndvc exp apply &lt;exp&gt;\r\ndvc exp branch &lt;exp&gt; best-lr<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-orange\">\n<h3>28) Queued &amp; Parallel Exps<\/h3>\n<p>        Queue multiple param sets and run in sequence or parallel (on CI\/compute).<\/p>\n<pre><code class=\"mono\">dvc exp run -S a=1 -S b=2 --queue\r\ndvc exp run --run-all<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-indigo\">\n<h3>29) Checkpoints &amp; dvclive<\/h3>\n<p>        Log metrics per step (checkpoints) and visualize learning curves. Useful for long DL training.<\/p>\n<pre><code class=\"mono\">pip install dvclive\r\nfrom dvclive import Live\r\nwith Live() as live:\r\n  for step in range(100):\r\n    live.log_metric(\"loss\", loss)\r\n    live.next_step()<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-emerald\">\n<h3>30) Q&amp;A \u2014 \u201cPipelines vs Notebooks?\u201d<\/h3>\n<p>        <span class=\"q\">Answer:<\/span> Notebooks are great for exploration; DVC pipelines codify steps for reproducibility, automation, CI, and collaboration.\n      <\/div>\n<p>      <!-- ===================== SECTION 4 ===================== --><\/p>\n<div class=\"section-title\">Section 4 \u2014 Remotes, CI\/CD, Performance &amp; Collaboration<\/div>\n<div class=\"card bg-blue\">\n<h3>31) Configure S3 Remote<\/h3>\n<p>        Use AWS creds\/profile; set as default. Server-side encryption can be handled by S3 config\/policy.<\/p>\n<pre><code class=\"mono\">dvc remote add -d s3store s3:\/\/ml-bucket\/proj\r\ndvc remote modify s3store profile default<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-green\">\n<h3>32) Other Remotes<\/h3>\n<p>        Azure, GCS, SSH, WebDAV, local path (NAS). Choose based on team infra and cost.<\/p>\n<pre><code class=\"mono\">dvc remote add azstore azure:\/\/cont\/path\r\ndvc remote add gsstore gs:\/\/bucket\/path\r\ndvc remote add nfs \/mnt\/mlstore<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-amber\">\n<h3>33) Credentials &amp; Security<\/h3>\n<p>        Keep secrets in env vars or vaults; don\u2019t commit keys. Use IAM roles\/managed identities when possible.<\/p>\n<pre><code class=\"mono\">export AWS_PROFILE=ml-team\r\nexport AZURE_STORAGE_CONNECTION_STRING=***<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-violet\">\n<h3>34) Team Workflow<\/h3>\n<p>        Git for code\/metadata; DVC for data. Open PRs with <code>dvc.lock<\/code> changes, push artifacts to remote, reviewers run <code>dvc pull<\/code> locally.<\/p>\n<pre><code class=\"mono\">git push origin feature-x\r\ndvc push<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-rose\">\n<h3>35) DVC Studio (Optional)<\/h3>\n<p>        Visualize experiments\/metrics across branches and PRs; compare models; share dashboards with stakeholders.<\/p>\n<pre><code class=\"mono\"># Connect repo + remote; experiments auto-sync<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-cyan\">\n<h3>36) CI with CML \/ GitHub Actions<\/h3>\n<p>        Automate <code>dvc pull<\/code>, <code>dvc repro<\/code>, <code>dvc push<\/code> in CI runners; post results to PR.<\/p>\n<pre><code class=\"mono\"># .github\/workflows\/ml.yml (snippet)\r\n- uses: iterative\/setup-dvc@v1\r\n- run: dvc pull\r\n- run: dvc repro\r\n- run: dvc push<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-lime\">\n<h3>37) Orchestration<\/h3>\n<p>        Wrap <code>dvc repro<\/code> in Makefiles or task runners; schedule with Airflow\/Argo if needed.<\/p>\n<pre><code class=\"mono\">make train   # runs: dvc repro train<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-orange\">\n<h3>38) Partial Retrieval<\/h3>\n<p>        Grab a single file\/dir from a specific revision without cloning repo history.<\/p>\n<pre><code class=\"mono\">dvc get &lt;repo-url&gt; path\/to\/file -r v1.2.0<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-indigo\">\n<h3>39) Performance Tuning<\/h3>\n<p>        Choose cache link type (reflink\/hardlink\/symlink\/copy), enable parallel jobs, avoid giant monolithic files; shard datasets.<\/p>\n<pre><code class=\"mono\">dvc config cache.type symlink,hardlink,copy\r\ndvc pull -j 8<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-emerald\">\n<h3>40) Q&amp;A \u2014 \u201cHuge datasets (TBs)?\u201d<\/h3>\n<p>        <span class=\"q\">Answer:<\/span> Store in object storage, use <code>import-url<\/code> for external sources, shard by directories, and pull only needed subsets for each job.\n      <\/div>\n<p>      <!-- ===================== SECTION 5 ===================== --><\/p>\n<div class=\"section-title\">Section 5 \u2014 MLOps, Maintenance, Troubleshooting &amp; Interview Q&amp;A<\/div>\n<div class=\"card bg-blue\">\n<h3>41) Repo Patterns<\/h3>\n<p>        Single-repo (code+data pointers) or data-registry pattern (central data repo consumed via <code>dvc import<\/code>). Pick based on team size and reuse.<\/p>\n<pre><code class=\"mono\"># Data registry \u2192 many model repos consume<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-green\">\n<h3>42) Reproducibility Tips<\/h3>\n<p>        Pin package versions, set seeds, capture params, and lock data\/model hashes in <code>dvc.lock<\/code>.<\/p>\n<pre><code class=\"mono\">python -m pip freeze &gt; requirements.txt\r\necho \"seed: 42\" &gt;&gt; params.yaml<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-amber\">\n<h3>43) Tracking vs MLflow<\/h3>\n<p>        DVC focuses on data\/pipelines\/versioning; MLflow specializes in experiment UI\/registry. Many teams use both (e.g., dvclive \u2192 MLflow).<\/p>\n<pre><code class=\"mono\"># dvclive logs \u2192 parse in MLflow dashboard if desired<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-violet\">\n<h3>44) Common Pitfalls<\/h3>\n<p>        Committing big blobs to Git, forgetting <code>dvc push<\/code>, breaking cache links, non-deterministic pipelines, and storing secrets in repo.<\/p>\n<pre><code class=\"mono\">Fix: .gitignore + env vars + pinned deps<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-rose\">\n<h3>45) Garbage Collection<\/h3>\n<p>        Clean unused cache from disk\/remote while keeping objects referenced by workspace\/branches\/tags.<\/p>\n<pre><code class=\"mono\">dvc gc -w -a -T   # keep workspace, all branches, tags<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-cyan\">\n<h3>46) Import &amp; Update<\/h3>\n<p>        Link external data repos and update later as they evolve.<\/p>\n<pre><code class=\"mono\">dvc import https:\/\/github.com\/org\/data-registry data\/images\r\ndvc update data\/images.dvc<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-lime\">\n<h3>47) Troubleshooting<\/h3>\n<p>        Diagnose environment and remote issues; verify creds and remote path.<\/p>\n<pre><code class=\"mono\">dvc doctor\r\ndvc remote list\r\ndvc status -c<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-orange tight\">\n<h3>48) Production Checklist<\/h3>\n<ul>\n<li>Remote configured + IAM\/keys secure<\/li>\n<li>Cache link type optimized<\/li>\n<li>Params\/metrics\/plots standardized<\/li>\n<li>CI runs <code>dvc repro<\/code> + pushes artifacts<\/li>\n<li>GC policy documented<\/li>\n<li>Data registry or import strategy defined<\/li>\n<\/ul><\/div>\n<div class=\"card bg-indigo\">\n<h3>49) Sample Pipeline<\/h3>\n<p>        End-to-end stages from data prep to evaluation.<\/p>\n<pre><code class=\"mono\">dvc stage add -n preprocess -d data\/raw -o data\/clean python prep.py\r\ndvc stage add -n featurize -d data\/clean -o data\/feats.npy python feats.py\r\ndvc stage add -n train -d data\/feats.npy -p train.lr,train.epochs -o models\/model.pkl python train.py\r\ndvc stage add -n eval -d models\/model.pkl -d data\/feats.npy -M metrics.json python eval.py<\/code><\/pre>\n<\/p><\/div>\n<div class=\"card bg-emerald qa\">\n<h3>50) Interview Q&amp;A \u2014 20 Practical Questions (Expanded)<\/h3>\n<p><b>1) Why DVC for ML?<\/b> Git-native workflows with reproducible pipelines and large-file versioning.<\/p>\n<p><b>2) How does DVC store data?<\/b> Content-addressed cache and a remote (e.g., S3); Git stores only pointers.<\/p>\n<p><b>3) DVC vs Git LFS?<\/b> DVC adds pipelines\/experiments\/metrics and uses your own object storage.<\/p>\n<p><b>4) What\u2019s in dvc.yaml?<\/b> Stages with <em>cmd<\/em>, <em>deps<\/em>, <em>outs<\/em>, <em>params<\/em>, <em>metrics<\/em>, <em>plots<\/em>.<\/p>\n<p><b>5) When to use <code>outs_no_cache<\/code>?<\/b> For large artifacts you don\u2019t want deduped in cache (e.g., reports).<\/p>\n<p><b>6) How do experiments differ from branches?<\/b> Lightweight, transient by default; can be applied or branched when chosen.<\/p>\n<p><b>7) How to share data?<\/b> Push to remote; teammates run <code>dvc pull<\/code>.<\/p>\n<p><b>8) How to compare runs?<\/b> <code>dvc metrics diff<\/code> and <code>dvc plots diff<\/code> across commits\/experiments.<\/p>\n<p><b>9) Can I run in CI?<\/b> Yes\u2014pull, repro, push; use CML\/GitHub Actions.<\/p>\n<p><b>10) How to pin params?<\/b> Store in <code>params.yaml<\/code>; DVC tracks and diffs.<\/p>\n<p><b>11) Handle secrets?<\/b> Env vars\/vault, never commit credentials; rely on cloud IAM.<\/p>\n<p><b>12) Cache too big?<\/b> Run <code>dvc gc<\/code>, prune old branches\/tags, shard datasets.<\/p>\n<p><b>13) Partial download?<\/b> <code>dvc get<\/code> for single files\/dirs at a revision.<\/p>\n<p><b>14) Repro slow?<\/b> Ensure stages produce minimal outs and use smart deps; leverage parallelism.<\/p>\n<p><b>15) Roll back a dataset?<\/b> Checkout older Git commit and <code>dvc pull<\/code>.<\/p>\n<p><b>16) Track notebooks?<\/b> Yes\u2014treat them as deps; better yet, convert steps to scripts for pipelines.<\/p>\n<p><b>17) Multiple remotes?<\/b> Add several and push selectively (e.g., cloud + on-prem).<\/p>\n<p><b>18) Resolve merge conflicts?<\/b> Regular Git for code; re-run DVC stages and commit updated <code>dvc.lock<\/code>.<\/p>\n<p><b>19) What is <code>dvc.lock<\/code>?<\/b> Frozen snapshot of exact data\/params\/deps used in a run.<\/p>\n<p><b>20) Auditing results?<\/b> Keep metrics\/plots in Git; PRs show diffs and provenance.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>DVC Pocket Book \u2014 Uplatz 50 deep-dive flashcards \u2022 Wide layout \u2022 Fewer scrolls \u2022 20+ Interview Q&amp;A \u2022 Readable code examples Section 1 \u2014 Fundamentals 1) What is DVC? <span class=\"readmore\"><a href=\"https:\/\/uplatz.com\/blog\/dvc-data-version-control-pocket-book\/\">Read More &#8230;<\/a><\/span><\/p>\n","protected":false},"author":2,"featured_media":4836,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2549,2462],"tags":[],"class_list":["post-4827","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dvc","category-pocket-book"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DVC (Data Version Control) Pocket Book | Uplatz Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uplatz.com\/blog\/dvc-data-version-control-pocket-book\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DVC (Data Version Control) Pocket Book | Uplatz Blog\" \/>\n<meta property=\"og:description\" content=\"DVC Pocket Book \u2014 Uplatz 50 deep-dive flashcards \u2022 Wide layout \u2022 Fewer scrolls \u2022 20+ Interview Q&amp;A \u2022 Readable code examples Section 1 \u2014 Fundamentals 1) What is DVC? 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