+#. type: =head1
+#: ../src/guestfs.pod:2762
+msgid "LIMITS"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:2764
+msgid "PROTOCOL LIMITS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2766
+msgid ""
+"Internally libguestfs uses a message-based protocol to pass API calls and "
+"their responses to and from a small \"appliance\" (see L</INTERNALS> for "
+"plenty more detail about this). The maximum message size used by the "
+"protocol is slightly less than 4 MB. For some API calls you may need to be "
+"aware of this limit. The API calls which may be affected are individually "
+"documented, with a link back to this section of the documentation."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2774
+msgid ""
+"A simple call such as L</guestfs_cat> returns its result (the file data) in "
+"a simple string. Because this string is at some point internally encoded as "
+"a message, the maximum size that it can return is slightly under 4 MB. If "
+"the requested file is larger than this then you will get an error."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2780
+msgid ""
+"In order to transfer large files into and out of the guest filesystem, you "
+"need to use particular calls that support this. The sections L</UPLOADING> "
+"and L</DOWNLOADING> document how to do this."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2784
+msgid ""
+"You might also consider mounting the disk image using our FUSE filesystem "
+"support (L<guestmount(1)>)."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2787
+msgid "MAXIMUM NUMBER OF DISKS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2789
+msgid "When using virtio disks (the default) the current limit is B<25> disks."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2792
+msgid ""
+"Virtio itself consumes 1 virtual PCI slot per disk, and PCI is limited to 31 "
+"slots. However febootstrap only understands disks with names C</dev/vda> "
+"through C</dev/vdz> (26 letters) and it reserves one disk for its own "
+"purposes."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2797
+msgid ""
+"We are working to substantially raise this limit in future versions but it "
+"requires complex changes to qemu."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2800
+msgid ""
+"In future versions of libguestfs it should also be possible to \"hot plug\" "
+"disks (add and remove disks after calling L</guestfs_launch>). This also "
+"requires changes to qemu."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2804
+msgid "MAXIMUM NUMBER OF PARTITIONS PER DISK"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2806
+msgid "Virtio limits the maximum number of partitions per disk to B<15>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2808
+msgid ""
+"This is because it reserves 4 bits for the minor device number (thus C</dev/"
+"vda>, and C</dev/vda1> through C</dev/vda15>)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2811
+msgid ""
+"If you attach a disk with more than 15 partitions, the extra partitions are "
+"ignored by libguestfs."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2814
+msgid "MAXIMUM SIZE OF A DISK"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2816
+msgid "Probably the limit is between 2**63-1 and 2**64-1 bytes."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2818
+msgid ""
+"We have tested block devices up to 1 exabyte (2**60 or "
+"1,152,921,504,606,846,976 bytes) using sparse files backed by an XFS host "
+"filesystem."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2822
+msgid ""
+"Although libguestfs probably does not impose any limit, the underlying host "
+"storage will. If you store disk images on a host ext4 filesystem, then the "
+"maximum size will be limited by the maximum ext4 file size (currently 16 "
+"TB). If you store disk images as host logical volumes then you are limited "
+"by the maximum size of an LV."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2828
+msgid ""
+"For the hugest disk image files, we recommend using XFS on the host for "
+"storage."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2831
+msgid "MAXIMUM SIZE OF A PARTITION"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2833
+msgid ""
+"The MBR (ie. classic MS-DOS) partitioning scheme uses 32 bit sector "
+"numbers. Assuming a 512 byte sector size, this means that MBR cannot "
+"address a partition located beyond 2 TB on the disk."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2837
+msgid ""
+"It is recommended that you use GPT partitions on disks which are larger than "
+"this size. GPT uses 64 bit sector numbers and so can address partitions "
+"which are theoretically larger than the largest disk we could support."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2842
+msgid "MAXIMUM SIZE OF A FILESYSTEM, FILES, DIRECTORIES"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2844
+msgid ""
+"This depends on the filesystem type. libguestfs itself does not impose any "
+"known limit. Consult Wikipedia or the filesystem documentation to find out "
+"what these limits are."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2848
+msgid "MAXIMUM UPLOAD AND DOWNLOAD"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2850
+msgid ""
+"The API functions L</guestfs_upload>, L</guestfs_download>, L</"
+"guestfs_tar_in>, L</guestfs_tar_out> and the like allow unlimited sized "
+"uploads and downloads."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2854
+msgid "INSPECTION LIMITS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2856
+msgid ""
+"The inspection code has several arbitrary limits on things like the size of "
+"Windows Registry hive it will read, and the length of product name. These "
+"are intended to stop a malicious guest from consuming arbitrary amounts of "
+"memory and disk space on the host, and should not be reached in practice. "
+"See the source code for more information."
+msgstr ""
+
git.annexia.org / libguestfs.git / commitdiff