From 0ccf0c6d184a58673891c84cb56c12fb1c326620 Mon Sep 17 00:00:00 2001 From: dlamoris Date: Fri, 10 Oct 2025 09:07:11 -0700 Subject: [PATCH 1/3] Create LICENSE --- LICENSE | 201 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 LICENSE diff --git a/LICENSE b/LICENSE new file mode 100644 index 00000000..261eeb9e --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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From be9d25a6b08ea49e4abbfbbe7fa1fdc50cde314b Mon Sep 17 00:00:00 2001 From: Jason Han Date: Fri, 7 Nov 2025 09:34:54 -0800 Subject: [PATCH 2/3] Add snippet about performance --- docs/index.rst | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/docs/index.rst b/docs/index.rst index 65a5b957..009ea1b8 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -111,6 +111,32 @@ Apply the initialization file Once the initialization file has been generated at ``cluster.trig``, apply this file to your empty quadstore (for example, by using its Graph Store Protocol API to insert the data) before using Flexo MMS. +Performance Considerations +-------------------------- + +Writing to a triplestore can impact query performance significantly. For production deployments with moderate to high load, we recommend using a dedicated write node and separate read-only nodes for the triple store. + +The service configuration supports this architecture through the following settings: + +- ``FLEXO_MMS_UPDATE_URL``: Points to your dedicated write node +- ``FLEXO_MMS_QUERY_URL``: Points to your read-only node(s) +- ``FLEXO_MMS_MASTER_QUERY_URL``: Optional endpoint for when you need the most up-to-date data (typically points to the write node) + +With this configuration: + +1. All write operations (updates, deletes) will be directed to the dedicated write node +2. Most read operations (queries) will be directed to the read-only node(s) +3. When absolute consistency is required, queries will use the master query URL + +This separation provides several benefits: + +- Improved query performance by offloading read traffic from the write node +- Better write throughput by dedicating resources to write operations +- Horizontal scalability by adding more read nodes as query demand increases +- Improved reliability as read operations can continue even if the write node is under heavy load + +For smaller deployments with limited traffic, a single node configuration may be sufficient, but as your model size and user base grow, the separated architecture becomes increasingly important. + API --------- From 34f3e9cc345b1cdfd893762797f091f75f80e19f Mon Sep 17 00:00:00 2001 From: Doris Lam Date: Thu, 20 Nov 2025 23:30:55 -0800 Subject: [PATCH 3/3] fix: move response to after model graph is completed when doing model commit, staging graph exists for branch create --- .../flexo/mms/routes/ldp/AnyMutate.kt | 6 ++-- .../flexo/mms/routes/ldp/BranchWrite.kt | 5 ---- .../flexo/mms/routes/sparql/ModelCommit.kt | 29 +++++++++---------- 3 files changed, 16 insertions(+), 24 deletions(-) diff --git a/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/AnyMutate.kt b/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/AnyMutate.kt index 55627d9a..9a42ccba 100644 --- a/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/AnyMutate.kt +++ b/src/main/kotlin/org/openmbee/flexo/mms/routes/ldp/AnyMutate.kt @@ -26,6 +26,9 @@ suspend fun LdpDcLayer1Context LdpDcLayer1Context LdpDcLayer1Context - // - // ==== Response closed ==== - // - - // predetermine snapshot graphs val modelGraph = "${prefixes["mor-graph"]}Model.${transactionId}" val stagingGraph = "${prefixes["mor-graph"]}Staging.${transactionId}" diff --git a/src/main/kotlin/org/openmbee/flexo/mms/routes/sparql/ModelCommit.kt b/src/main/kotlin/org/openmbee/flexo/mms/routes/sparql/ModelCommit.kt index a9cd8713..22b9a6d7 100644 --- a/src/main/kotlin/org/openmbee/flexo/mms/routes/sparql/ModelCommit.kt +++ b/src/main/kotlin/org/openmbee/flexo/mms/routes/sparql/ModelCommit.kt @@ -128,22 +128,7 @@ fun Route.commitModel() { if (success == null) { throw HttpException("Sparql Update failed for some reason", HttpStatusCode.BadRequest) } - // set etag header - call.response.header(HttpHeaders.ETag, transactionId) - - // provide location of new resource - call.response.header(HttpHeaders.Location, prefixes["morc"]!!) - - // forward response to client - call.respondText( - constructResponseText, - status = HttpStatusCode.Created, - contentType = RdfContentTypes.Turtle, - ) - - // - // ==== Response closed ==== - // + log("copy graph <$stagingGraphIri> to graph ${prefixes["mor-graph"]}Model.${transactionId} ;") // begin copying staging to model @@ -177,6 +162,18 @@ fun Route.commitModel() { "_modelGraph" to "${prefixes["mor-graph"]}Model.${transactionId}", ) } + // set etag header + call.response.header(HttpHeaders.ETag, transactionId) + + // provide location of new resource + call.response.header(HttpHeaders.Location, prefixes["morc"]!!) + + // forward response to client + call.respondText( + constructResponseText, + status = HttpStatusCode.Created, + contentType = RdfContentTypes.Turtle, + ) } finally { deleteTransaction() }