diff --git a/Hadoop-Benchmark.md b/Hadoop-Benchmark.md
index e9f8548..3751448 100644
--- a/Hadoop-Benchmark.md
+++ b/Hadoop-Benchmark.md
@@ -26,7 +26,7 @@ Then get the seaweedfs hadoop client jar.
 
 ```
 cd share/hadoop/common/lib/
-wget https://oss.sonatype.org/service/local/repositories/releases/content/com/github/chrislusf/seaweedfs-hadoop2-client/1.6.7/seaweedfs-hadoop2-client-1.6.7.jar
+wget https://oss.sonatype.org/service/local/repositories/releases/content/com/github/chrislusf/seaweedfs-hadoop2-client/1.6.8/seaweedfs-hadoop2-client-1.6.8.jar
 ```
 
 # TestDFSIO Benchmark
diff --git a/Hadoop-Compatible-File-System.md b/Hadoop-Compatible-File-System.md
index 5de1141..7e8308f 100644
--- a/Hadoop-Compatible-File-System.md
+++ b/Hadoop-Compatible-File-System.md
@@ -10,12 +10,12 @@ $ mvn install
 # build for hadoop2
 $cd $GOPATH/src/github.com/chrislusf/seaweedfs/other/java/hdfs2
 $ mvn package
-$ ls -al target/seaweedfs-hadoop2-client-1.6.7.jar
+$ ls -al target/seaweedfs-hadoop2-client-1.6.8.jar
 
 # build for hadoop3
 $cd $GOPATH/src/github.com/chrislusf/seaweedfs/other/java/hdfs3
 $ mvn package
-$ ls -al target/seaweedfs-hadoop3-client-1.6.7.jar
+$ ls -al target/seaweedfs-hadoop3-client-1.6.8.jar
 
 ```
 Maven
@@ -23,7 +23,7 @@ Maven
 <dependency>
   <groupId>com.github.chrislusf</groupId>
   <artifactId>seaweedfs-hadoop3-client</artifactId>
-  <version>1.6.7</version>
+  <version>1.6.8</version>
 </dependency>
 
 or 
@@ -31,23 +31,23 @@ or
 <dependency>
   <groupId>com.github.chrislusf</groupId>
   <artifactId>seaweedfs-hadoop2-client</artifactId>
-  <version>1.6.7</version>
+  <version>1.6.8</version>
 </dependency>
 
 ```
 
 Or you can download the latest version from MavenCentral
 * https://mvnrepository.com/artifact/com.github.chrislusf/seaweedfs-hadoop2-client
-  * [seaweedfs-hadoop2-client-1.6.7.jar](https://oss.sonatype.org/service/local/repositories/releases/content/com/github/chrislusf/seaweedfs-hadoop2-client/1.6.7/seaweedfs-hadoop2-client-1.6.7.jar)
+  * [seaweedfs-hadoop2-client-1.6.8.jar](https://oss.sonatype.org/service/local/repositories/releases/content/com/github/chrislusf/seaweedfs-hadoop2-client/1.6.8/seaweedfs-hadoop2-client-1.6.8.jar)
 * https://mvnrepository.com/artifact/com.github.chrislusf/seaweedfs-hadoop3-client
-  * [seaweedfs-hadoop3-client-1.6.7.jar](https://oss.sonatype.org/service/local/repositories/releases/content/com/github/chrislusf/seaweedfs-hadoop3-client/1.6.7/seaweedfs-hadoop3-client-1.6.7.jar)
+  * [seaweedfs-hadoop3-client-1.6.8.jar](https://oss.sonatype.org/service/local/repositories/releases/content/com/github/chrislusf/seaweedfs-hadoop3-client/1.6.8/seaweedfs-hadoop3-client-1.6.8.jar)
 
 # Test SeaweedFS on Hadoop
 
 Suppose you are getting a new Hadoop installation. Here are the minimum steps to get SeaweedFS to run.
 
-You would need to start a weed filer first, build the seaweedfs-hadoop2-client-1.6.7.jar 
-or seaweedfs-hadoop3-client-1.6.7.jar, and do the following:
+You would need to start a weed filer first, build the seaweedfs-hadoop2-client-1.6.8.jar 
+or seaweedfs-hadoop3-client-1.6.8.jar, and do the following:
 
 ```
 # optionally adjust hadoop memory allocation
@@ -60,12 +60,12 @@ $ echo "<configuration></configuration>" > etc/hadoop/mapred-site.xml
 # on hadoop2
 $ bin/hdfs dfs -Dfs.defaultFS=seaweedfs://localhost:8888 \
                -Dfs.seaweedfs.impl=seaweed.hdfs.SeaweedFileSystem \
-               -libjars ./seaweedfs-hadoop2-client-1.6.7.jar \
+               -libjars ./seaweedfs-hadoop2-client-1.6.8.jar \
                -ls /
 # or on hadoop3
 $ bin/hdfs dfs -Dfs.defaultFS=seaweedfs://localhost:8888 \
                -Dfs.seaweedfs.impl=seaweed.hdfs.SeaweedFileSystem \
-               -libjars ./seaweedfs-hadoop3-client-1.6.7.jar \
+               -libjars ./seaweedfs-hadoop3-client-1.6.8.jar \
                -ls /
 
 ```
@@ -112,9 +112,9 @@ $ bin/hadoop classpath
 # Copy SeaweedFS HDFS client jar to one of the folders
 $ cd ${HADOOP_HOME}
 # for hadoop2
-$ cp ./seaweedfs-hadoop2-client-1.6.7.jar share/hadoop/common/lib/
+$ cp ./seaweedfs-hadoop2-client-1.6.8.jar share/hadoop/common/lib/
 # or for hadoop3
-$ cp ./seaweedfs-hadoop3-client-1.6.7.jar share/hadoop/common/lib/
+$ cp ./seaweedfs-hadoop3-client-1.6.8.jar share/hadoop/common/lib/
 ```
 
 Now you can do this:
diff --git a/Run-Blob-Storage-on-Public-Internet.md b/Run-Blob-Storage-on-Public-Internet.md
index 248c41a..b4069d0 100644
--- a/Run-Blob-Storage-on-Public-Internet.md
+++ b/Run-Blob-Storage-on-Public-Internet.md
@@ -14,7 +14,7 @@ We will use 2 servers. Server 1 will host master, 2x volumes (2 disks, one volum
 # todo: use 2 step build process, copy over weed binary to fresh container (do not need curl and tar at runtime)
 FROM alpine
 RUN apk update && apk add wget tar
-RUN wget https://github.com/chrislusf/seaweedfs/releases/download/2.66/linux_amd64_large_disk.tar.gz
+RUN wget https://github.com/chrislusf/seaweedfs/releases/download/2.68/linux_amd64_large_disk.tar.gz
 RUN tar -xf linux_amd64_large_disk.tar.gz
 RUN chmod +x weed
 RUN mv weed /usr/bin/
diff --git a/Run-Presto-on-SeaweedFS.md b/Run-Presto-on-SeaweedFS.md
index 3990328..a0307ef 100644
--- a/Run-Presto-on-SeaweedFS.md
+++ b/Run-Presto-on-SeaweedFS.md
@@ -5,10 +5,10 @@ The installation steps are divided into 2 steps:
 * https://cwiki.apache.org/confluence/display/Hive/AdminManual+Metastore+Administration
 
 ### Configure Hive Metastore to support SeaweedFS
-1. Copy the seaweedfs-hadoop2-client-1.6.7.jar to hive lib directory,for example:
+1. Copy the seaweedfs-hadoop2-client-1.6.8.jar to hive lib directory,for example:
 ```
-cp seaweedfs-hadoop2-client-1.6.7.jar /opt/hadoop/share/hadoop/common/lib/
-cp seaweedfs-hadoop2-client-1.6.7.jar /opt/hive-metastore/lib/
+cp seaweedfs-hadoop2-client-1.6.8.jar /opt/hadoop/share/hadoop/common/lib/
+cp seaweedfs-hadoop2-client-1.6.8.jar /opt/hive-metastore/lib/
 ```
 2. Modify core-site.xml  
 modify core-site.xml to support SeaweedFS, 30888 is the filer port
@@ -50,9 +50,9 @@ metastore.thrift.port is the access port exposed by the Hive Metadata service it
 Follow instructions for installation of Presto:
 * https://prestosql.io/docs/current/installation/deployment.html
 ### Configure Presto to support SeaweedFS
-1. Copy the seaweedfs-hadoop2-client-1.6.7.jar to Presto directory,for example:
+1. Copy the seaweedfs-hadoop2-client-1.6.8.jar to Presto directory,for example:
 ```
-cp seaweedfs-hadoop2-client-1.6.7.jar /opt/presto-server-347/plugin/hive-hadoop2/
+cp seaweedfs-hadoop2-client-1.6.8.jar /opt/presto-server-347/plugin/hive-hadoop2/
 ```
 2. Modify core-site.xml
 
diff --git a/run-HBase-on-SeaweedFS.md b/run-HBase-on-SeaweedFS.md
index f877996..8989a64 100644
--- a/run-HBase-on-SeaweedFS.md
+++ b/run-HBase-on-SeaweedFS.md
@@ -1,7 +1,7 @@
 # Installation for HBase
 
 Two steps to run HBase on SeaweedFS
-1. Copy the seaweedfs-hadoop2-client-1.6.7.jar to `${HBASE_HOME}/lib`
+1. Copy the seaweedfs-hadoop2-client-1.6.8.jar to `${HBASE_HOME}/lib`
 1. And add the following 2 properties in `${HBASE_HOME}/conf/hbase-site.xml`
 
 ```
diff --git a/run-Spark-on-SeaweedFS.md b/run-Spark-on-SeaweedFS.md
index a705757..0d39ec4 100644
--- a/run-Spark-on-SeaweedFS.md
+++ b/run-Spark-on-SeaweedFS.md
@@ -11,12 +11,12 @@ To make these files visible to Spark, set HADOOP_CONF_DIR in $SPARK_HOME/conf/sp
 
 ## installation not inheriting from Hadoop cluster configuration
 
-Copy the seaweedfs-hadoop2-client-1.6.7.jar to all executor machines.
+Copy the seaweedfs-hadoop2-client-1.6.8.jar to all executor machines.
 
 Add the following to spark/conf/spark-defaults.conf on every node running Spark
 ```
-spark.driver.extraClassPath=/path/to/seaweedfs-hadoop2-client-1.6.7.jar
-spark.executor.extraClassPath=/path/to/seaweedfs-hadoop2-client-1.6.7.jar
+spark.driver.extraClassPath=/path/to/seaweedfs-hadoop2-client-1.6.8.jar
+spark.executor.extraClassPath=/path/to/seaweedfs-hadoop2-client-1.6.8.jar
 ```
 
 And modify the configuration at runtime:
@@ -37,8 +37,8 @@ And modify the configuration at runtime:
   1. change the spark-defaults.conf
 
 ```
-spark.driver.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.7.jar
-spark.executor.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.7.jar
+spark.driver.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.8.jar
+spark.executor.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.8.jar
 spark.hadoop.fs.seaweedfs.impl=seaweed.hdfs.SeaweedFileSystem
 ```
 
@@ -81,8 +81,8 @@ spark.history.fs.cleaner.enabled=true
 spark.history.fs.logDirectory=seaweedfs://localhost:8888/spark2-history/
 spark.eventLog.dir=seaweedfs://localhost:8888/spark2-history/
 
-spark.driver.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.7.jar
-spark.executor.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.7.jar
+spark.driver.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.8.jar
+spark.executor.extraClassPath=/Users/chris/go/src/github.com/chrislusf/seaweedfs/other/java/hdfs2/target/seaweedfs-hadoop2-client-1.6.8.jar
 spark.hadoop.fs.seaweedfs.impl=seaweed.hdfs.SeaweedFileSystem
 spark.hadoop.fs.defaultFS=seaweedfs://localhost:8888
 ```