To enable just an IGFS persistence there is no need to use HDFS (this requires Hadoop dependency, requires configured HDFS cluster, etc.). We have requests https://issues.apache.org/jira/browse/IGNITE-1120 , https://issues.apache.org/jira/browse/IGNITE-1926 to implement the persistence upon local file system, and we already close to the solution.
Regarding the secondary Fs doc page ( http://apacheignite.gridgain.org/docs/secondary-file-system) I would suggest to add the following text there: ------------------------ If Ignite node with secondary file system configured on a machine with Hadoop distribution, make sure Ignite is able to find appropriate Hadoop libraries: set HADOOP_HOME environment variable for the Ignite process if you're using Apache Hadoop distribution, or, if you use another distribution (HDP, Cloudera, BigTop, etc.) make sure /etc/default/hadoop file exists and has appropriate contents. If Ignite node with secondary file system configured on a machine without Hadoop distribution, you can manually add necessary Hadoop dependencies to Ignite node classpath: these are dependencies of groupId "org.apache.hadoop" listed in file modules/hadoop/pom.xml . Currently they are: 1. hadoop-annotations 2. hadoop-auth 3. hadoop-common 4. hadoop-hdfs 5. hadoop-mapreduce-client-common 6. hadoop-mapreduce-client-core ------------------------ On Mon, Dec 14, 2015 at 11:21 AM, Valentin Kulichenko < valentin.kuliche...@gmail.com> wrote: > Guys, > > Why don't we include ignite-hadoop module in Fabric? This user simply wants > to configure HDFS as a secondary file system to ensure persistence. Not > having the opportunity to do this in Fabric looks weird to me. And actually > I don't think this is a use case for Hadoop Accelerator. > > -Val > > On Mon, Dec 14, 2015 at 12:11 AM, Denis Magda <dma...@gridgain.com> wrote: > > > Hi Ivan, > > > > 1) Yes, I think that it makes sense to have the old versions of the docs > > while an old version is still considered to be used by someone. > > > > 2) Absolutely, the time to add a corresponding article on the readme.io > > has come. It's not the first time I see the question related to HDFS as a > > secondary FS. > > Before and now it's not clear for me what exact steps I should follow to > > enable such a configuration. Our current suggestions look like a puzzle. > > I'll assemble the puzzle on my side and prepare the article. Ivan if you > > don't mind I would reaching you out directly asking for any technical > > assistance if needed. > > > > Regards, > > Denis > > > > > > On 12/14/2015 10:25 AM, Ivan V. wrote: > > > >> Hi, Valentin, > >> > >> 1) first of all note that the author of the question uses not the latest > >> doc page, namely > >> http://apacheignite.gridgain.org/v1.0/docs/igfs-secondary-file-system . > >> This is version 1.0, while the latest is 1.5: > >> https://apacheignite.readme.io/docs/hadoop-accelerator. Besides, it > >> appeared that some links from the latest doc version point to 1.0 doc > >> version. I fixed that in several places where I found that. Do we really > >> need old doc versions (1.0 -1.4)? > >> > >> 2) our documentation ( > >> http://apacheignite.gridgain.org/docs/secondary-file-system) does not > >> provide any special setup instructions to configure HDFS as secondary > file > >> system in Ignite. Our docs assume that if a user wants to integrate with > >> Hadoop, (s)he follows generic Hadoop integration instruction (e.g. > >> http://apacheignite.gridgain.org/docs/installing-on-apache-hadoop). It > >> looks like the page > >> http://apacheignite.gridgain.org/docs/secondary-file-system should be > >> more > >> clear regarding the required configuration steps (in fact, setting up > >> HADOOP_HOME variable for Ignite node process). > >> > >> 3) Hadoop jars are correctly found by Ignite if the following conditions > >> are met: > >> (a) The "Hadoop Edition" distribution is used (not a "Fabric" edition). > >> (b) Either HADOOP_HOME environment variable is set up (for Apache Hadoop > >> distribution), or file "/etc/default/hadoop" exists and matches the > Hadoop > >> distribution used (BigTop, Cloudera, HDP, etc.) > >> > >> The exact mechanism of the Hadoop classpath composition can be found in > >> files > >> IGNITE_HOME/bin/include/hadoop-classpath.sh > >> IGNITE_HOME/bin/include/setenv.sh . > >> > >> The issue is discussed in > >> https://issues.apache.org/jira/browse/IGNITE-372 > >> , https://issues.apache.org/jira/browse/IGNITE-483 . > >> > >> On Sat, Dec 12, 2015 at 3:45 AM, Valentin Kulichenko < > >> valentin.kuliche...@gmail.com> wrote: > >> > >> Igniters, > >>> > >>> I'm looking at the question on SO [1] and I'm a bit confused. > >>> > >>> We ship ignite-hadoop module only in Hadoop Accelerator and without > >>> Hadoop > >>> JARs, assuming that user will include them from the Hadoop distribution > >>> he > >>> uses. It seems OK for me when accelerator is plugged in to Hadoop to > run > >>> mapreduce jobs, but I can't figure out steps required to configure HDFS > >>> as > >>> a secondary FS for IGFS. Which Hadoop JARs should be on classpath? Is > >>> user > >>> supposed to add them manually? > >>> > >>> Can someone with more expertise in our Hadoop integration clarify > this? I > >>> believe there is not enough documentation on this topic. > >>> > >>> BTW, any ideas why user gets exception for JobConf class which is in > >>> 'mapred' package? Why map-reduce class is being used? > >>> > >>> [1] > >>> > >>> > >>> > http://stackoverflow.com/questions/34221355/apache-ignite-what-are-the-dependencies-of-ignitehadoopigfssecondaryfilesystem > >>> > >>> -Val > >>> > >>> > > >
