Fix an error in README-server-edition.html.

FossilOrigin-Name: 754ad35cd26da361e2ed736b0e400497714a0db9b7fd05fd24e7803b6f478263

diff --git a/README-server-edition.html b/README-server-edition.html
index d6eff66323686392b005babbed93bd983403343f..2513de03c3806ce2cb41f85957509052ea69c313 100644 (file)
--- a/README-server-edition.html
+++ b/README-server-edition.html
@@ -194,10 +194,6 @@ also in some ways more complicated than multi-process mode. "BEGIN READONLY"
 support works as follows:
 
 <ul>
-  <li> <p>Clients executing "BEGIN READONLY" transactions are not assigned
-    a &lt;client-id&gt;. Instead, they have a transaction-id that is unique
-    within the lifetime of the process. Transaction-ids are assigned using a 
-    monotonically increasing function.
 
   <li> <p>In single-process mode, writers never spill the cache mid-transaction.
     Data is only written to the database as part of committing a transaction.
@@ -207,22 +203,29 @@ support works as follows:
     containing the original data for each page overwritten by the current
     transaction in main-memory.
 
-  <li> <p>When a transaction is to be committed, a writer first obtains a
-    transaction-id (in the same way as a BEGIN READONLY client) and then adds
-    all of its "old data" buffers to a hash table accessible to all database
-    clients. Associated with each hash table entry is the newly assigned
-    transaction-id. It then waits (spin-locks) for all "BEGIN READONLY"
-    read-locks to clear on all pages that will be written out by the
-    transaction. Following this, it commits the transaction as normal (writes
-    out the dirty pages and zeroes the journal file header).
+  <li> <p>When a transaction is ready to be committed, a writer obtains a
+    transaction-id. Transaction-ids are assigned to writers using a
+    monotonically increasing function. The writer then adds all of its "old
+    data" buffers to a hash table accessible to all database clients.
+    Associated with each hash table entry is the newly assigned transaction-id.
+    It then waits (spin-locks) for all "BEGIN READONLY" read-locks to clear on
+    all pages that will be written out by the transaction. Following this, it
+    commits the transaction as normal (writes out the dirty pages and zeroes
+    the journal file header).
+
+  <li> <p>Clients executing "BEGIN READONLY" transactions are not assigned
+    a &lt;client-id&gt;. Instead, they are assigned a transaction-id that is 
+    either (a) that of the oldest transaction-id belonging to a writer that has
+    not yet finished committing, or (b) if there are currently no writers
+    committing then the value that will be assigned to the next committer.
 
   <li> <p>When a "BEGIN READONLY" transaction reads a page, it first checks
     the aforementioned hash table for a suitable entry. A suitable entry
-    is one with the right page-number and a transaction-id greater than that
-    of the "BEGIN READONLY" transaction (i.e. one added to the hash table 
-    <i>after</i> the BEGIN READONLY transaction started). If such an entry
-    can be found, the client uses the associated data instead of reading
-    from the db file. Or, if no such entry is found, the client:
+    is one with the right page-number and a transaction-id greater than or
+    equal to that of the "BEGIN READONLY" transaction (i.e. one that had not
+    finished committing when the BEGIN READONLY transaction started). If such 
+    an entry can be found, the client uses the associated data instead of
+    reading from the db file. Or, if no such entry is found, the client:
     <ol>
       <li> Increments the number of BEGIN READONLY read-locks on the page.
       <li> Reads the contents of the page from the database file.

diff --git a/manifest b/manifest
index 2f4c8bc9926f99ae83a6d1b756c8c594cc34482e..e185151f20f7421fc42fb3e3b8dc6f74af5ccbe1 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,11 +1,11 @@
-C Update\sand\sadd\sfurther\sdetail\sto\sREADME-server-edition.html.
-D 2018-03-30T20:42:25.654
+C Fix\san\serror\sin\sREADME-server-edition.html.
+D 2018-03-31T18:43:20.756
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 7016fc56c6b9bfe5daac4f34be8be38d8c0b5fab79ccbfb764d3b23bf1c6fff3
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc bdcad21b027a56a73e54a1121cfb9edd0a35c0abfa53aa12c2f996006ff99960
-F README-server-edition.html 2065bc7f89b84ec9e4199aeae3786399a3bb88cd8ed3f7398067d010d7c4cf8b
+F README-server-edition.html b98409c486d6f02871b20a9e29e1e18cd050a02e03062569ffb051774b4d6861
 F README.md 1d5342ebda97420f114283e604e5fe99b0da939d63b76d492eabbaae23488276
 F VERSION cdf91ac446255ecf3d8f6d8c3ee40d64123235ae5b3cef29d344e61b45ec3759
 F aclocal.m4 a5c22d164aff7ed549d53a90fa56d56955281f50
@@ -1729,7 +1729,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P df52e89fff54dbb650cd1fb2b7afe0467acea96a0056728ef48e0c3fea40eeb2
-R 7d4ea8fb7a75fedab49e62a0da9de0ed
+P 337a0b67e30f1030fdc59f712e5914f4801b0e9e4ae19a1e82c10b73eb3f4773
+R 5045a1c8302fea1a74fa92a9ce0972dd
 U dan
-Z c5379dcb0a548050240d2cfa8c04d0d8
+Z d3c495daa23a1fc63d551424dd8817b7

diff --git a/manifest.uuid b/manifest.uuid
index 6ea9d6f82be0595ffd439c59b524b1860534508c..1e69d7d4c1966e8c5e7c075b169e3b15c1b4f4d8 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-337a0b67e30f1030fdc59f712e5914f4801b0e9e4ae19a1e82c10b73eb3f4773
\ No newline at end of file
+754ad35cd26da361e2ed736b0e400497714a0db9b7fd05fd24e7803b6f478263
\ No newline at end of file