From ceb03358a1d713078ae36bfff07be62b433d970a Mon Sep 17 00:00:00 2001
From: Dana Robinson <43805+derobins@users.noreply.github.com>
Date: Mon, 23 Oct 2023 19:06:18 -0700
Subject: Bump the ros3 VFD cache to 16 MiB (#3759)

---
 release_docs/RELEASE.txt | 4 ++--
 src/H5FDros3.c           | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index a5bcb94..222c277 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -236,13 +236,13 @@ New Features
 
     Library:
     --------
-    - Added a simple cache to the read-only S3 VFD
+    - Added a simple cache to the read-only S3 (ros3) VFD
 
       The read-only S3 VFD now caches the first N bytes of a file stored
       in S3 to avoid a lot of small I/O operations when opening files.
       This cache is per-file and created when the file is opened.
 
-      N is currently 4kiB or the size of the file, whichever is smaller.
+      N is currently 16 MiB or the size of the file, whichever is smaller.
 
       Addresses GitHub issue #3381
 
diff --git a/src/H5FDros3.c b/src/H5FDros3.c
index f704eff..c6aea0e 100644
--- a/src/H5FDros3.c
+++ b/src/H5FDros3.c
@@ -44,7 +44,7 @@
 #define ROS3_STATS 0
 
 /* Max size of the cache, in bytes */
-#define ROS3_MAX_CACHE_SIZE 4096
+#define ROS3_MAX_CACHE_SIZE 16777216
 
 /* The driver identification number, initialized at runtime
  */
-- 
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