Change misc defaults

* category.create=pfrd
* moveonenospc=pfrd
* cache.files=off
* parallel-direct-writes=true

These changes were made to match the recommended settings for most
users to reduce confusion.

Author: trapexit

mkdocs/docs/config/options.md

@@ -35,7 +35,7 @@ These options are the same regardless of whether you use them with the
   exceeded) the policy selected will run to find a new location for
   the file. An attempt to move the file to that branch will occur
   (keeping all metadata possible) and if successful the original is
-  unlinked and the write retried. (default: false, true = mfs)
+  unlinked and the write retried. (default: pfrd)
 - **[inodecalc](inodecalc.md)=passthrough|path-hash|devino-hash|hybrid-hash**:
   Selects the inode calculation algorithm. (default: hybrid-hash)
 - **dropcacheonclose=BOOL**: When a file is requested to be closed
@@ -160,7 +160,7 @@ These options are the same regardless of whether you use them with the
   epall)
 - **[category.create](functions_categories_policies.md)=POLICY**: Sets
   policy of all FUSE functions in the create category. (default:
-  epmfs)
+  pfrd)
 - **[category.search](functions_categories_policies.md)=POLICY**: Sets
   policy of all FUSE functions in the search category. (default: ff)
 - **[cache.statfs](cache.md#cachestatfs)=UINT**: 'statfs' cache
@@ -171,8 +171,8 @@ These options are the same regardless of whether you use them with the
   timeout in seconds. (default: 1)
 - **[cache.negative_entry](cache.md#cachenegative_entry)=UINT**:
   Negative file name lookup cache timeout in seconds. (default: 0)
-- **[cache.files](cache.md#cachefiles)=libfuse|off|partial|full|auto-full|per-process**:
-  File page caching mode (default: libfuse)
+- **[cache.files](cache.md#cachefiles)=off|partial|full|auto-full|per-process**:
+  File page caching mode (default: off)
 - **cache.files.process-names=LIST**: A pipe | delimited list of
   process [comm](https://man7.org/linux/man-pages/man5/proc.5.html)
   names to enable page caching for when

mkdocs/docs/faq/configuration_and_policies.md

@@ -19,12 +19,12 @@ filesystems and can be added or removed without any impact it is
 extremely easy to test and experiment with different settings.
 
 
-## Why is epmfs the default create policy?
+## Why is pfrd the default create policy?
 
-Because it is a strict policy and therefore does not increase entropy
-of the filesystem layout. If you don't explicitly choose a policy then
-the layout stays the same. It is far easier to stop being strict than
-fix the layout after having a loose policy.
+Originally the default was `epmfs` however it was found to cause
+significant confusion among new users who expected mergerfs to always
+choose a branch with available space. For mergerfs v2.41.0 it was
+decided to change the default to the less restrictive policy `pfrd`.
 
 
 ## How can I ensure files are collocated on the same branch?
@@ -88,5 +88,5 @@ If you wish to move files around or balance the pool you can:
    in mind that this tool is really just an example of how to
    accomplish such a task. The tool does not keep track of links so
    you may encounter an increase in used space if you rely on links to
-   reduce redundency. However, you can run a file dedup program like
+   reduce redundancy. However, you can run a file dedup program like
    [rdfind](https://github.com/pauldreik/rdfind) to restore the links.

mkdocs/docs/quickstart.md

@@ -22,6 +22,7 @@ cases.
 
 * cache.files=off
 * category.create=pfrd
+* func.getattr=newest
 * dropcacheonclose=false
 
 In previous versions of Linux it was unable to support `mmap` if [page
@@ -44,13 +45,15 @@ IO.)
 
 * cache.files=auto-full
 * category.create=pfrd
+* func.getattr=newest
 * dropcacheonclose=true
 
 
 #### You don't need `mmap`
 
 * cache.files=off
 * category.create=pfrd
+* func.getattr=newest
 * dropcacheonclose=false
 
 
@@ -59,14 +62,14 @@ IO.)
 ### Command Line
 
 ```
-mergerfs -o cache.files=off,dropcacheonclose=false,category.create=pfrd /mnt/hdd0:/mnt/hdd1 /media
+mergerfs -o cache.files=off,category.create=pfrd,func.getattr=newest,dropcacheonclose=false /mnt/hdd0:/mnt/hdd1 /media
 ```
 
 
 ### /etc/fstab
 
 ```
-/mnt/hdd0:/mnt/hdd1 /media mergerfs cache.files=off,dropcacheonclose=false,category.create=pfrd 0 0
+/mnt/hdd0:/mnt/hdd1 /media mergerfs cache.files=off,category.create=pfrd,func.getattr=newest,dropcacheonclose=false 0 0
 ```
 
 ### /etc/fstab w/ config file
@@ -86,6 +89,7 @@ For more complex setups it can be useful to separate out the config.
 ```ini title="media.ini" linenums="1"
 cache.files=off
 category.create=pfrd
+func.getattr=newest
 dropcacheonclose=false
 ```
 
@@ -119,6 +123,7 @@ ExecStart=/usr/bin/mergerfs \
   -f \
   -o cache.files=off \
   -o category.create=pfrd \
+  -o func.getattr=newest \
   -o dropcacheonclose=false \
   /mnt/hdd0:/mnt/hdd1 \
   /media
@@ -182,6 +187,7 @@ ExecStart=/usr/bin/mergerfs \
   -f \
   -o cache.files=off \
   -o category.create=pfrd \
+  -o func.getattr=newest \
   -o dropcacheonclose=false \
   /mnt/hdd0:/mnt/hdd1 \
   /media

src/config.cpp

@@ -87,7 +87,7 @@ Config::Config()
     branches_mount_timeout(0),
     cache_attr(1),
     cache_entry(1),
-    cache_files(CacheFiles::ENUM::LIBFUSE),
+    cache_files(CacheFiles::ENUM::OFF),
     cache_files_process_names(CACHE_FILES_PROCESS_NAMES_DEFAULT),
     cache_negative_entry(0),
     cache_readdir(false),
@@ -110,10 +110,10 @@ Config::Config()
     link_exdev(LinkEXDEV::ENUM::PASSTHROUGH),
     log_metrics(false),
     mountpoint(),
-    moveonenospc(false),
+    moveonenospc(true),
     nfsopenhack(NFSOpenHack::ENUM::OFF),
     nullrw(false),
-    parallel_direct_writes(false),
+    parallel_direct_writes(true),
     posix_acl(false),
     readahead(0),
     readdir("seq"),

src/config_moveonenospc.cpp

@@ -31,11 +31,13 @@ MoveOnENOSPC::from_string(const std::string &s_)
 
   rv = str::from(s_,&enabled);
   if((rv == 0) && (enabled == true))
-    s = "mfs";
+    s = "pfrd";
+  ef((rv == 0) && (enabled == false))
+    return (enabled = false,0);
   ef(rv != 0)
     s = s_;
   else
-    return 0;
+    return -EINVAL;
 
   tmp = Policies::Create::find(s);
   if(tmp == NULL)

src/config_moveonenospc.hpp

@@ -30,7 +30,7 @@ class MoveOnENOSPC : public ToFromString
 public:
   MoveOnENOSPC(const bool enabled_)
     : enabled(enabled_),
-      policy(&Policies::Create::mfs)
+      policy(&Policies::Create::pfrd)
   {
   }
 

src/func.hpp

@@ -87,7 +87,7 @@ namespace Func
     {
     public:
       CreateDefault()
-        : Func::Base::Create(&Policies::Create::epmfs)
+        : Func::Base::Create(&Policies::Create::pfrd)
       {
       }
     };