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Posted to commits@hudi.apache.org by vi...@apache.org on 2021/02/14 10:09:19 UTC
[hudi] branch asf-site updated: [MINOR][DOCS] Add query latency
trade-off for COW vs MOR (#2576)
This is an automated email from the ASF dual-hosted git repository.
vinoyang pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/hudi.git
The following commit(s) were added to refs/heads/asf-site by this push:
new e86f635 [MINOR][DOCS] Add query latency trade-off for COW vs MOR (#2576)
e86f635 is described below
commit e86f635b50490c6810b080892ab574f9cd21df28
Author: tooptoop4 <33...@users.noreply.github.com>
AuthorDate: Sun Feb 14 10:09:05 2021 +0000
[MINOR][DOCS] Add query latency trade-off for COW vs MOR (#2576)
---
docs/_docs/0.7.0/2_1_overview.md | 1 +
docs/_docs/2_1_overview.md | 1 +
2 files changed, 2 insertions(+)
diff --git a/docs/_docs/0.7.0/2_1_overview.md b/docs/_docs/0.7.0/2_1_overview.md
index 11890fc..0e61922 100644
--- a/docs/_docs/0.7.0/2_1_overview.md
+++ b/docs/_docs/0.7.0/2_1_overview.md
@@ -88,6 +88,7 @@ Following table summarizes the trade-offs between these two table types
| Trade-off | CopyOnWrite | MergeOnRead |
|-------------- |------------------| ------------------|
| Data Latency | Higher | Lower |
+| Query Latency | Lower | Higher |
| Update cost (I/O) | Higher (rewrite entire parquet) | Lower (append to delta log) |
| Parquet File Size | Smaller (high update(I/0) cost) | Larger (low update cost) |
| Write Amplification | Higher | Lower (depending on compaction strategy) |
diff --git a/docs/_docs/2_1_overview.md b/docs/_docs/2_1_overview.md
index bcfd19e..5565ec2 100644
--- a/docs/_docs/2_1_overview.md
+++ b/docs/_docs/2_1_overview.md
@@ -87,6 +87,7 @@ Following table summarizes the trade-offs between these two table types
| Trade-off | CopyOnWrite | MergeOnRead |
|-------------- |------------------| ------------------|
| Data Latency | Higher | Lower |
+| Query Latency | Lower | Higher |
| Update cost (I/O) | Higher (rewrite entire parquet) | Lower (append to delta log) |
| Parquet File Size | Smaller (high update(I/0) cost) | Larger (low update cost) |
| Write Amplification | Higher | Lower (depending on compaction strategy) |