After edge cache (2 Oct), this post covers batch APIs: why they beat N+1 loops, size caps, partial success, per-item idempotency, ordering, atomic vs best-effort, rate accounting, async jobs and per-item authz.

बैचAPI: A Metrical Codification of Batch APIs (with English glosses)

What this post is about

A batch API accepts many ids or operations in one HTTP request to cut chattiness. It needs strict bounds and per-item results.

Topics covered

1. N+1 / chatty client problem
2. Max batch size
3. Partial success responses
4. Per-item idempotency
5. Ordering and parallelism
6. Atomic vs best-effort
7. Rate-limit accounting
8. Sync small vs async large
9. Per-item authorization
10. Link to pagination

Sanskrit title

बैचAPI keeps the loanword batch with API; the dharma is measured grouping of work.

ग्राह्यम् / Keep

१. कठोरसीमा: max items
२. प्रतिमदउत्तरम्: per-item result objects
३. मदकुञ्चिका: idempotency per item
४. क्रमघोषणा: order/parallel documented
५. दरस्पष्टता: 1 vs N rate cost
६. बृहत्जॉब्: large batches become jobs
७. प्रतिमदाधिकारः: authz each id

त्याज्यम् / Avoid

• unbounded batch arrays
• single boolean success for whole batch with side effects
• retry whole batch without item keys

पदच्छेदः
सहस्रं एकैकं यदि क्रमेण तदा विलम्बो दाहश्च । बैचAPIstस्माद् मितसमूहः ॥१॥

Word-for-word

Gloss table

English sense
N+1 client loops against chatty APIs create latency and rate-limit pain. Batch endpoints accept a bounded list of operations or ids in one request.

Context / topic
Topic: why batch APIs.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
समूहसीमा कठोरा लेख्या । अनन्तबैचः कुण्डं हन्ति ॥२॥

Word-for-word

Gloss table

English sense
Hard-cap batch size (for example 100). A million-id batch is a denial of service with extra steps.

Context / topic
Topic: batch size cap. Links to pagination spirit.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
आंशिकसत्यं प्रतिमदं परिणामैः । सर्वं वा किञ्चिद् न गूढम् ॥३॥

Word-for-word

Gloss table

English sense
Return per-item status codes or error objects. All-or-nothing without saying which index failed forces blind retries of the whole batch.

Context / topic
Topic: partial failure semantics.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
इदमर्थता बैचे मदं प्रति । पुनर्यत्ने द्विः मा कर्म ॥४॥

Word-for-word

Gloss table

English sense
Each item should carry an idempotency key when side effects exist so retrying the batch is safe.

Context / topic
Topic: idempotent batch items.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
क्रमः यदि इष्टः तदा लेख्यः अन्यथा समानान्तरं । गूढक्रमः ग्राहकं भ्रमयति ॥५॥

Word-for-word

Gloss table

English sense
Document whether items run sequentially or concurrently and whether order of results matches request order.

Context / topic
Topic: ordering and concurrency.

वृत्तमिति: एकादशाक्षराः पादाः।

पदच्छेदः
एकत्रुटौ सर्वं स्तम्भयेत् वा नीतिं स्पश । atomic बैचः पृथग् घोष्यः ॥६॥

Word-for-word

Gloss table

English sense
Some batches are transactional all-or-nothing; most HTTP batches are best-effort per item. Say which.

Context / topic
Topic: atomic vs best-effort batch.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
दरगणना मदेन वा बैचेन स्पष्टा । गुप्तगुणनं सीमां हन्ति ॥७॥

Word-for-word

Gloss table

English sense
Define whether one batch counts as one request or N toward rate limits. Surprise N× costing breaks clients.

Context / topic
Topic: rate limit accounting. Links to rate limit.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
बृहत्बैचः async जॉब् पथाय । लघुबैचः सजीव उत्तरम् ॥८॥

Word-for-word

Gloss table

English sense
Huge imports should become job ids with status polling (or webhooks) not multi-minute HTTP holds.

Context / topic
Topic: sync vs async batch. Links to job scheduling.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
प्रमाणं मदेन भिद्येत अधिकारः । एकदोषे सर्वं मा उद्घाटय ॥९॥

Word-for-word

Gloss table

English sense
Authorize each item. Do not return other tenants’ data because one id in the batch was allowed.

Context / topic
Topic: per-item authz. Links to tenancy + IAM.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
पृष्ठांकनं सूचीं काटति बैचः कर्मसमूहं वहति । उभौ मितौ चैटि नश्यति ॥१०॥

Word-for-word

Gloss table

English sense
Pagination slices reads; batch groups writes or multi-gets. Together they remove chatty client loops.

Context / topic
Topic: link to pagination (22 Sep).

सन्धिः: पृष्ठं पठति; बैचः करोति/बहुपठति।

वृत्तमिति: एकादशाक्षराः पादाः।

पदच्छेदः
सीमा आंशिकता इदमर्थः क्रमः दरः पञ्चकम् । एभिर्बैचAPI मितसमूहसमन्वितः ॥११॥

Word-for-word

Gloss table

English sense
Five limbs: hard size, per-item results, idempotent items, documented order and clear rate cost.

Context / topic
Topic: checklist.

वृत्तमिति: ८-८-८-८।

पदच्छेदः
इति बैचAPIसारो मितसमूहसमन्वितः । मितं समूहं क्रियायोग्यं तन्त्रधर्मः स उच्यते ॥१२॥

Word-for-word

Gloss table

English sense
Closing: group work in honest bounded batches so clients and servers share one clock of cost.

Context / topic
Topic: close.

उपसंहारन्यायः: मितं समूहय; प्रतिमदं वद; द्विः मा दह।

वृत्तमिति: ८-८-८-८।

१. Why batch
२. Size cap
३. Partial results
४. Idempotency
५. Order
६. Atomic policy
७. Rate cost
८. Async large
९. Per-item authz
१०. Pagination link
११. Five limbs
१२. Close

1. Prior: pagination 2026-09-22; rate limit 2026-08-13; retry 2026-08-14; jobs 2026-07-31.
2. Domain: batch/bulk HTTP API design.
3. Bilingual word-for-word + sense.
4. Style: no em dash; no Oxford comma in English clauses.