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feat: support QMD_EMBED_MODEL and QMD_EMBED_CTX_SIZE env vars #261

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feat: support QMD_EMBED_MODEL and QMD_EMBED_CTX_SIZE env vars #261

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4 changes: 3 additions & 1 deletion src/llm.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -386,7 +386,7 @@ export class LlamaCpp implements LLM {


constructor(config: LlamaCppConfig = {}) {
this.embedModelUri = config.embedModel || DEFAULT_EMBED_MODEL;
this.embedModelUri = config.embedModel || process.env.QMD_EMBED_MODEL || DEFAULT_EMBED_MODEL;
this.generateModelUri = config.generateModel || DEFAULT_GENERATE_MODEL;
this.rerankModelUri = config.rerankModel || DEFAULT_RERANK_MODEL;
this.modelCacheDir = config.modelCacheDir || MODEL_CACHE_DIR;
Expand Down Expand Up @@ -627,10 +627,12 @@ export class LlamaCpp implements LLM {
// Embed contexts are ~143 MB each (nomic-embed 2048 ctx)
const n = await this.computeParallelism(150);
const threads = await this.threadsPerContext(n);
const envCtxSize = process.env.QMD_EMBED_CTX_SIZE ? parseInt(process.env.QMD_EMBED_CTX_SIZE) : undefined;
for (let i = 0; i < n; i++) {
try {
this.embedContexts.push(await model.createEmbeddingContext({
...(threads > 0 ? { threads } : {}),
...(envCtxSize ? { contextSize: envCtxSize } : {}),
}));
} catch {
if (this.embedContexts.length === 0) throw new Error("Failed to create any embedding context");
Expand Down