rizaon commented on code in PR #4518:
URL: https://github.com/apache/iceberg/pull/4518#discussion_r861311067
##########
core/src/main/java/org/apache/iceberg/CatalogProperties.java:
##########
@@ -53,6 +56,57 @@ private CatalogProperties() {
public static final long CACHE_EXPIRATION_INTERVAL_MS_DEFAULT =
TimeUnit.SECONDS.toMillis(30);
public static final long CACHE_EXPIRATION_INTERVAL_MS_OFF = -1;
+ /**
+ * When using {@link CachingFileIO} as io-impl, define the internal FileIO
that is
+ * wrapped by CachingFileIO.
+ * <p>
+ * Default to {@link HadoopFileIO} if not defined.
+ */
+ public static final String CONTENT_CACHE_WRAPPED_FILE_IO_IMPL =
"cache.content.wrapped-io-impl";
+ public static final String CONTENT_CACHE_WRAPPED_FILE_IO_IMPL_DEFAULT =
HadoopFileIO.class.getName();
+
+ /**
+ * Controls the duration for which entries in the {@link CachingFileIO} are
cached.
+ * <p>
+ * Behavior of specific values of cache.expiration-interval-ms:
+ * <ul>
+ * <li> Negative Values - Caching disabled</li>
+ * <li> Zero - Cache entries expires only if it gets evicted due to memory
pressure from
+ * {@link #CONTENT_CACHE_MAX_TOTAL_BYTES} setting.
+ * </li>
+ * <li> Positive Values - Cache entries expire if not accessed via the
cache after this many milliseconds</li>
+ * </ul>
+ */
+ public static final String CONTENT_CACHE_EXPIRATION_INTERVAL_MS =
"cache.content.expiration-interval-ms";
Review Comment:
I renamed these with `IO_CACHE_` and `io.cache.` prefix to match with
`io.cache-enabled`.
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