Merge branch 'tom' into 'master'

Drop header and reorder.

See merge request !331

content/good_hcc_practices/_index.md

@@ -22,6 +22,14 @@ operations, such as testing and running applications, one should use an
 lots of threads for compiling applications, or checking the job status multiple times a minute.
 
 ## File Systems
+* **No POSIX file system performs well with an excessive number of files**, as each file operation
+requires opening and closing, which is relatively expensive.
+* Moreover, network data transfer operations that involve frequent scanning (walking) of every
+file in a set for syncing operations (backups, automated copying) can become excessively taxing for
+network file systems, especially at scale.
+* Large numbers of files can take an inordinate amount of time to transfer in or out of network
+file systems during data migration operations.
+* **Computing workflows can be negatively impacted by unnecessarily large numbers of file operations**, including file transfers.
 * Some I/O intensive jobs may benefit from **copying the data to the fast, temporary /scratch 
 file system local to each worker nodes**. The */scratch* directories are unique per job, and 
 are deleted when the job finishes. Thus, the last step of the batch script should copy the 
@@ -36,15 +44,6 @@ all the necessary files need to be either moved to a permanent storage, or delet
 disk, in your program.** This approach stresses the file system and may cause general issues. 
 Instead, consider reading and writing large blocks of data in memory over time, or 
 utilizing more advanced parallel I/O libraries, such as *parallel hdf5* and *parallel netcdf*.
-#### Large numbers of files considerations
-    * **No POSIX file system performs well with an excessive number of files**, as each file operation 
-requires opening and closing, which is relatively expensive.
-    * Moreover, network data transfer operations that involve frequent scanning (walking) of every 
-file in a set for syncing operations (backups, automated copying) can become excessively taxing for 
-network file systems, especially at scale.
-    * Large numbers of files can take an inordinate amount of time to transfer in or out of network 
-file systems during data migration operations.
-    * **Computing workflows can be negatively impacted by unnecessarily large numbers of file operations**, including file transfers.
 
 
 ## Internal and External Networks